improved indentation and whitespace for markdown code blocks

All code blocks in markdown have been intended by at least 4 spaces. We add `--tab-stop=8` to all `pandoc(1)` executions in order to set a better tab stop indentation, especially for tab intended code blocks. Changed `bin/pandoc-wrapper.sh` VERSION from "1.5.3 2024-03-26" to "1.6 2024-03-31". Fixed `1991/brnstnd/sorta.README.md` so that the sorta code is code blocks. Removed unneeded paragraph group in copyright in `inc/footer.default.html`. Fixed excess whitespace after list Author on entry `index.html` page. Changed `bin/output-index-author.sh` VERSION from "1.5.2 2024-03-26" to "1.6 2024-03-31". Performed `make www` to perform the above and test under macOS. TODO: Fix the problem of the initial line of code being extra intended. TODO: Fix excess whitespace around code that is inline.
2024-04-01 04:48:48 -07:00
1 parent b84c27ce02
commit a996f8d2b8
@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Christopher_Mills">Christopher Mills</a><br>
-Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
-<br><br></li>
+Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)</li>
 </ul>

 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,35 +141,35 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->

 <h2 id="to-build">To build:</h2>
-<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
+<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span></span></code></pre></div>
 <p>If you wish to save state so that you can run the program and keep files changed
 (for instance you don’t want to compile <code>mullender.c</code> again) you can compile it
 like:</p>
-<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> clobber SAVE=1 all</span></code></pre></div>
+<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span> clobber SAVE=1 all</span></code></pre></div>
 <p>Make sure that if you do add a file (including by compiling code) that before
 you exit (ctrl-e) you type in <code>sync</code>! Otherwise the file might not exist or it
 will be corrupt if it does.</p>
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
 <p>The current status of this entry is:</p>
-<pre><code>STATUS: known bug - please help us fix
-STATUS: INABIAF - please **DO NOT** fix</code></pre>
+<pre><code>    STATUS: known bug - please help us fix
+    STATUS: INABIAF - please **DO NOT** fix</code></pre>
 <p>For more detailed information see <a href="../../bugs.html#2018_mills">2018 mills bugs</a>.</p>
 <h2 id="to-use">To use:</h2>
-<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span></code></pre></div>
+<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./prog</span></span></code></pre></div>
 <h2 id="try">Try:</h2>
-<div class="sourceCode" id="cb5"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span></code></pre></div>
+<div class="sourceCode" id="cb5"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./prog</span></span></code></pre></div>
 <p>At the <code>&gt;boot</code> prompt, type return.</p>
 <p>At the <code>:</code> prompt, type <code>rk(0,0)rkunix</code> and wait for it to initialise itself.
 Now try typing:</p>
-<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="fu">cat</span> <span class="op">&gt;</span> prog.c</span>
-<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a><span class="fu">main()</span><span class="kw">{</span> <span class="bu">printf</span><span class="er">(</span><span class="st">&quot;Hello, world!\n&quot;</span><span class="kw">);</span> <span class="kw">}</span></span>
-<span id="cb6-3"><a href="#cb6-3" aria-hidden="true" tabindex="-1"></a><span class="ex">^D</span></span>
-<span id="cb6-4"><a href="#cb6-4" aria-hidden="true" tabindex="-1"></a><span class="fu">cc</span> prog.c</span>
-<span id="cb6-5"><a href="#cb6-5" aria-hidden="true" tabindex="-1"></a><span class="ex">a.out</span></span></code></pre></div>
+<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">cat</span> <span class="op">&gt;</span> prog.c</span>
+<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a>    <span class="fu">main()</span><span class="kw">{</span> <span class="bu">printf</span><span class="er">(</span><span class="st">&quot;Hello, world!\n&quot;</span><span class="kw">);</span> <span class="kw">}</span></span>
+<span id="cb6-3"><a href="#cb6-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">^D</span></span>
+<span id="cb6-4"><a href="#cb6-4" aria-hidden="true" tabindex="-1"></a>    <span class="fu">cc</span> prog.c</span>
+<span id="cb6-5"><a href="#cb6-5" aria-hidden="true" tabindex="-1"></a>    <span class="ex">a.out</span></span></code></pre></div>
 <p>where <code>^D</code> is EOF.</p>
 <p>Next try:</p>
-<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a><span class="fu">cc</span> mullender.c</span>
-<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a><span class="ex">a.out</span></span></code></pre></div>
+<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">cc</span> mullender.c</span>
+<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">a.out</span></span></code></pre></div>
 <p>… and enjoy the classic <a href="../../1984/mullender/index.html">1984/mullender</a> entry as
 it would have been in 1984 with a VAX-11/PDP-11! Once it reaches the end of the
 line, hit enter and see what happens again. When you’re tired of it hit ctrl-c.</p>
@@ -181,18 +180,18 @@ line, hit enter and see what happens again. When you’re tired of it hit ctrl-c
 3636 bytes, which is considerably lighter than the original machine it can replace.</p>
 <p>This program can take you back to the start of everything, it is possible to
 run v0. Just type:</p>
-<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./v0</span></span></code></pre></div>
+<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./v0</span></span></code></pre></div>
 <p>NOTE: To quit v0, press Control-E.</p>
 <p>You will be greeted with a familiar prompt of “login”. The username and
 password are “dmr” and “dmr”. To make things more familiar you’ll need to
 create ‘.’ as it hasn’t been invented yet on this image!</p>
-<div class="sourceCode" id="cb9"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a><span class="ex">@</span> ln dd dmr .</span></code></pre></div>
+<div class="sourceCode" id="cb9"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">@</span> ln dd dmr .</span></code></pre></div>
 <p>An <code>ls</code> will reveal that C hasn’t been invented yet! IOBCC anyone? The
 compiler is <code>bc</code>. It produces assembly, which will then need to be assembled
 together like <code>ops.s bl.s hello.s bi.s</code> (in that order) to produce a.out!</p>
 <p>But wait, we said this was the start of it all! This program can also run a
 program that replaces an even larger machine that can run BSD 2.9. To start this,</p>
-<div class="sourceCode" id="cb10"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span></code></pre></div>
+<div class="sourceCode" id="cb10"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./prog</span></span></code></pre></div>
 <p>At the <code>&gt;boot</code> prompt, type return.</p>
 <p>At the “:” prompt, type <code>rk(0,0)rkunix</code>.</p>
 <p>NOTE: To quit prog, press Control-E.</p>
@@ -200,7 +199,7 @@ program that replaces an even larger machine that can run BSD 2.9. To start this
 the very first IOCCC entries <a href="../../1984/mullender/index.html">1984/mullender</a>, as
 shown earlier.</p>
 <p>But wait, there is even more! Try:</p>
-<div class="sourceCode" id="cb11"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./v6</span></span></code></pre></div>
+<div class="sourceCode" id="cb11"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./v6</span></span></code></pre></div>
 <p>At the <code>@</code> prompt, type <code>rkunix</code>. You might want to type <code>stty -lcase</code> as
 otherwise the output will be in all caps.</p>
 <p>NOTE: To quit v6, press Control-E.</p>
@@ -225,42 +224,42 @@ can build versions that can run each of the following:</p>
 <h3 id="building-and-running-bsd-2.9">Building and Running BSD 2.9:</h3>
 <p>To run BSD 2.9, do <code>make</code> to build <code>prog</code> and then <code>./prog</code> to run it.</p>
 <p>You should see a prompt from the first-stage bootloader that looks like</p>
-<pre><code>&gt;boot</code></pre>
+<pre><code>    &gt;boot</code></pre>
 <p>Hit enter/return at this point and you will get to the second-stage boot loader
 that looks like</p>
-<pre><code>40Boot
-:</code></pre>
+<pre><code>    40Boot
+    :</code></pre>
 <p>The 40 in the prompt indicates that the bootloader has correctly determined
 that we are running on a PDP-11/40.</p>
 <p>At this point, type the rather cryptic command <code>rk(0,0)rkunix</code> – this tells
 the system to look at the first partition on the first <code>RK05</code> fixed disk, find
 the <code>rkunix</code> file and load it. You should eventually see the following:</p>
-<pre><code>&gt;boot
+<pre><code>    &gt;boot

-40Boot
-: rk(0,0)rkunix
+    40Boot
+    : rk(0,0)rkunix

-Berkeley UNIX (Rev. 2.9.1) Sun Nov 20 14:55:50 PST 1983
-mem = 135872
+    Berkeley UNIX (Rev. 2.9.1) Sun Nov 20 14:55:50 PST 1983
+    mem = 135872

-CONFIGURE SYSTEM:
-xp ? csr 176700 vector 254 skipped:  No CSR
-rk 0 csr 177400 vector 220 attached
-hk ? csr 177440 vector 210 skipped:  No CSR
-rl ? csr 174400 vector 160 skipped:  No CSR
-rp ? csr 176700 vector 254 skipped:  No CSR
-ht 0 csr 172440 vector 224 skipped:  No CSR
-tm 0 csr 172520 vector 224 skipped:  No CSR
-ts 0 csr 172520 vector 224 skipped:  No CSR
-dh ? csr 160020 vector 370 skipped:  No CSR
-dm ? csr 170500 vector 360 skipped:  No autoconfig routines
-dz ? csr 160110 vector 320 skipped:  No CSR
-dz ? csr 160110 vector 320 skipped:  No CSR
-dn 0 csr 175200 vector 300 skipped:  No autoconfig routines
-vp ? csr 177500 vector 174 skipped:  No autoconfig routines
-lp ? csr 177514 vector 200 skipped:  No CSR
-Erase=^?, kill=^U, intr=^C
-#</code></pre>
+    CONFIGURE SYSTEM:
+    xp ? csr 176700 vector 254 skipped:  No CSR
+    rk 0 csr 177400 vector 220 attached
+    hk ? csr 177440 vector 210 skipped:  No CSR
+    rl ? csr 174400 vector 160 skipped:  No CSR
+    rp ? csr 176700 vector 254 skipped:  No CSR
+    ht 0 csr 172440 vector 224 skipped:  No CSR
+    tm 0 csr 172520 vector 224 skipped:  No CSR
+    ts 0 csr 172520 vector 224 skipped:  No CSR
+    dh ? csr 160020 vector 370 skipped:  No CSR
+    dm ? csr 170500 vector 360 skipped:  No autoconfig routines
+    dz ? csr 160110 vector 320 skipped:  No CSR
+    dz ? csr 160110 vector 320 skipped:  No CSR
+    dn 0 csr 175200 vector 300 skipped:  No autoconfig routines
+    vp ? csr 177500 vector 174 skipped:  No autoconfig routines
+    lp ? csr 177514 vector 200 skipped:  No CSR
+    Erase=^?, kill=^U, intr=^C
+    #</code></pre>
 <p>Congratulations, you are running BSD UNIX 2.9 in single-user mode as root.</p>
 <p>On the other hand, if you did a typo somewhere, the boot loader has probably
 crashed and halted – if so, type Control-E to quit the emulator and try
@@ -270,15 +269,15 @@ If so, consider a <code>make clean</code> to start from scratch.</p>
 root prompt. Most of the commands you are familiar with work here (this was
 only a quarter of a century ago – how much could things have changed?).
 Let’s try some:</p>
-<div class="sourceCode" id="cb15"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb15-1"><a href="#cb15-1" aria-hidden="true" tabindex="-1"></a><span class="co"># ls</span></span>
-<span id="cb15-2"><a href="#cb15-2" aria-hidden="true" tabindex="-1"></a><span class="ex">.cshrc</span>       .profile     boot         hkunix       mnt          tmp</span>
-<span id="cb15-3"><a href="#cb15-3" aria-hidden="true" tabindex="-1"></a><span class="ex">.login</span>       2.9stamp     dev          lib          mullender.c  unix</span>
-<span id="cb15-4"><a href="#cb15-4" aria-hidden="true" tabindex="-1"></a><span class="ex">.msgsrc</span>      bin          etc          lost+found   rkunix       usr</span>
-<span id="cb15-5"><a href="#cb15-5" aria-hidden="true" tabindex="-1"></a><span class="co"># df</span></span>
-<span id="cb15-6"><a href="#cb15-6" aria-hidden="true" tabindex="-1"></a><span class="ex">Filesystem</span>  Mounted on  kbytes    used    free  % used</span>
-<span id="cb15-7"><a href="#cb15-7" aria-hidden="true" tabindex="-1"></a><span class="ex">/dev/rk0</span>    /             1958    1688     270     86%</span>
-<span id="cb15-8"><a href="#cb15-8" aria-hidden="true" tabindex="-1"></a><span class="co"># bin/cc mullender.c</span></span>
-<span id="cb15-9"><a href="#cb15-9" aria-hidden="true" tabindex="-1"></a><span class="co"># ./a.out</span></span></code></pre></div>
+<div class="sourceCode" id="cb15"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb15-1"><a href="#cb15-1" aria-hidden="true" tabindex="-1"></a>    <span class="co"># ls</span></span>
+<span id="cb15-2"><a href="#cb15-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">.cshrc</span>       .profile     boot         hkunix       mnt          tmp</span>
+<span id="cb15-3"><a href="#cb15-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">.login</span>       2.9stamp     dev          lib          mullender.c  unix</span>
+<span id="cb15-4"><a href="#cb15-4" aria-hidden="true" tabindex="-1"></a>    <span class="ex">.msgsrc</span>      bin          etc          lost+found   rkunix       usr</span>
+<span id="cb15-5"><a href="#cb15-5" aria-hidden="true" tabindex="-1"></a>    <span class="co"># df</span></span>
+<span id="cb15-6"><a href="#cb15-6" aria-hidden="true" tabindex="-1"></a>    <span class="ex">Filesystem</span>  Mounted on  kbytes    used    free  % used</span>
+<span id="cb15-7"><a href="#cb15-7" aria-hidden="true" tabindex="-1"></a>    <span class="ex">/dev/rk0</span>    /             1958    1688     270     86%</span>
+<span id="cb15-8"><a href="#cb15-8" aria-hidden="true" tabindex="-1"></a>    <span class="co"># bin/cc mullender.c</span></span>
+<span id="cb15-9"><a href="#cb15-9" aria-hidden="true" tabindex="-1"></a>    <span class="co"># ./a.out</span></span></code></pre></div>
 <p>The program you’ve just run was the [winning entry of the first IOCCC contest from
 1984] <a href="../../1984/mullender/mullender.c" title="mullender.c">1</a> (or was it 1894?), a personal favorite of mine. It is rather
 tightly bound to running on either a PDP-11 or a VAX-11. Now you have one.</p>
@@ -300,51 +299,51 @@ possible, but I didn’t get around to it… As the Judges can no doubt attest,
 <p>Research UNIX v6 and BSD 2.9 use the same executable, but require a different
 disk image. Type <code>make v6</code> to build it, then type <code>./prog</code> to run it.</p>
 <p>You should see the boot loader prompt which is a single <code>@</code>:</p>
-<pre><code>@</code></pre>
+<pre><code>    @</code></pre>
 <p>At this point, you again must type a special incantation: <code>rkunix</code>. After that
 you should see:</p>
-<pre><code>@rkunix
-mem = 1035
-RESTRICTED RIGHTS
+<pre><code>    @rkunix
+    mem = 1035
+    RESTRICTED RIGHTS

-Use, duplication or disclosure is subject to
-restrictions stated in Contract with Western
-Electric Company, Inc.
-#</code></pre>
+    Use, duplication or disclosure is subject to
+    restrictions stated in Contract with Western
+    Electric Company, Inc.
+    #</code></pre>
 <p>You are now running a single-user session of v6 UNIX. You might want to start
 with <code>stty -lcase</code> because otherwise everything will be IN ALL CAPS.</p>
 <p>Again, if you failed typing seven characters without making a mistake, you
 may need to use Control-E to quit the emulation.</p>
 <p>Assuming you’re more careful than that, we can try a few commands:</p>
-<pre><code>@rkunix
-mem = 1035
-RESTRICTED RIGHTS
+<pre><code>    @rkunix
+    mem = 1035
+    RESTRICTED RIGHTS

-Use, duplication or disclosure is subject to
-restrictions stated in Contract with Western
-Electric Company, Inc.
-# STTY -LCASE
-# ls
-bin
-dev
-etc
-hpunix
-lib
-mnt
-rkunix
-rpunix
-tmp
-unix
-usr
-# cat &gt; foo.c
-main()
-{
-    printf(&quot;Hello, World!\n&quot;);
-}
-^D
-# cc foo.c
-# ./a.out
-Hello, World!</code></pre>
+    Use, duplication or disclosure is subject to
+    restrictions stated in Contract with Western
+    Electric Company, Inc.
+    # STTY -LCASE
+    # ls
+    bin
+    dev
+    etc
+    hpunix
+    lib
+    mnt
+    rkunix
+    rpunix
+    tmp
+    unix
+    usr
+    # cat &gt; foo.c
+    main()
+    {
+        printf(&quot;Hello, World!\n&quot;);
+    }
+    ^D
+    # cc foo.c
+    # ./a.out
+    Hello, World!</code></pre>
 <p>Why is Version 6 interesting? Well, it was the oldest version that I could
 find a boot image of that had a C compiler… This C compiler is recognizably
 C, but not quite the same syntax as we have today. It’s much closer to the
@@ -387,13 +386,13 @@ it hadn’t been named that yet).</p>
 <p>You can try out this version by typing <code>make v0</code>. Since this version is a
 native PDP-7 emulation, it gets its own binary. Type <code>./v0</code> to run it. You
 should see the login prompt.</p>
-<pre><code>login:</code></pre>
+<pre><code>    login:</code></pre>
 <p>There are two user accounts <code>ken</code> and <code>dmr</code>, with the passwords <code>ken</code> and <code>dmr</code>
 respectively. Let’s try the Dennis Richie’s <code>dmr</code> account:</p>
-<pre><code>login: dmr
-password: dmr
-@ ls
-.       ?</code></pre>
+<pre><code>    login: dmr
+    password: dmr
+    @ ls
+    .       ?</code></pre>
 <p>Even though this is not Ken’s doing, I feel this gives me licence to
 include this quote from the BSD <code>fortune</code> program:</p>
 <blockquote>
@@ -415,51 +414,51 @@ directory doesn’t have that yet, but we can make it, because the home
 directory has a hard link to <code>dd</code>, which is the directory that holds all
 of the user home directories (this will eventually become <code>/</code>, the root
 path). We can do</p>
-<pre><code>@ ln dd dmr .</code></pre>
+<pre><code>    @ ln dd dmr .</code></pre>
 <p>To make the new link (note that <code>ln</code> doesn’t support paths either, so you have
 to give it three arguments – a directory in the current dir, a file in that
 directory, and the new name).</p>
 <p>Now <code>ls</code> will work, and we can try some other things while we are here:</p>
-<pre><code>login: dmr
-password: dmr
-@ ln dd dmr .
-@ ls
-dd
-system
-as.s
-b_readme
-bi.s
-bl.s
-db.s
-hello.b
-ops.s
-.
-@ cat b_readme
-Here is how to compile and run hello.b:
+<pre><code>    login: dmr
+    password: dmr
+    @ ln dd dmr .
+    @ ls
+    dd
+    system
+    as.s
+    b_readme
+    bi.s
+    bl.s
+    db.s
+    hello.b
+    ops.s
+    .
+    @ cat b_readme
+    Here is how to compile and run hello.b:

-@ bc hello.b hello.s
-@ as ops.s bl.s hello.s bi.s
-I
-II
-ops.s
-bl.s
-hello.s
-bi.s
-@ a.out
-Hello, World!
+    @ bc hello.b hello.s
+    @ as ops.s bl.s hello.s bi.s
+    I
+    II
+    ops.s
+    bl.s
+    hello.s
+    bi.s
+    @ a.out
+    Hello, World!


-@ bc hello.b hello.s
-@ as ops.s bl.s hello.s bi.s
-I
-II
-ops.s
-bl.s
-hello.s
-bi.s
-@ a.out
-Hello, World!
-@</code></pre>
+    @ bc hello.b hello.s
+    @ as ops.s bl.s hello.s bi.s
+    I
+    II
+    ops.s
+    bl.s
+    hello.s
+    bi.s
+    @ a.out
+    Hello, World!
+    @</code></pre>
 <p>The last command is invoking the compiler for an extremely early version of
 the [B programming language] <a href="https://www.bell-labs.com/usr/dmr/www/kbman.html" title="B Language">3</a>, the predecessor to C. Thompson missed the
 convenience of writing code in a high-level language – Multics was written