Various fixes and updates

Make lines beginning (in markdown files) 'BTW' bold. Rebuilt the
respective html pages.

Slight update to abstract in two entries (1985/shapiro and
1994/shapiro). One is changing 'defines' to '#defines' and the other was
a typo fix.

Fixed make gen_next: added missing new files.

Various fixes in next/register.html (typos and other things).

2020/ferguson1/troubleshooting.html

@@ -757,7 +757,7 @@ so that by setting the size to -1 it went to the max unsigned value):</p>
 <pre><code>    $ MAXSIZE=-1 ./prog
     memory error
     X:0/157 Y:0/42 S:3/18446744073709551614 B:0</code></pre>
-<p>BTW: there are two arrays that have to be <strong>MAXSIZE</strong> (technically + 1).</p>
+<p><strong>BTW</strong>: there are two arrays that have to be <strong>MAXSIZE</strong> (technically + 1).</p>
 <p>Is it possible that some value specified by the user could mess this up? I do
 not know but what I do know is that because it’s unsigned it can’t be negative;
 if the max size is 0 then the array size will be 1 but it won’t matter because

2020/ferguson1/troubleshooting.md

@@ -450,7 +450,7 @@ so that by setting the size to -1 it went to the max unsigned value):
 ```
 
 
-BTW: there are two arrays that have to be **MAXSIZE** (technically + 1).
+**BTW**: there are two arrays that have to be **MAXSIZE** (technically + 1).
 
 Is it possible that some value specified by the user could mess this up? I do
 not know but what I do know is that because it's unsigned it can't be negative;

2020/ferguson2/README.md

@@ -284,7 +284,7 @@ After that you can input the string and it'll go from there.
 #### Example run
 </div>
 
-BTW: There's a much more entertaining way to explore this entry. See
+**BTW**: There's a much more entertaining way to explore this entry. See
 [recode.html][] for more details. There's a secret message that one might like
 to decipher. These however show the general program as well as how to use the
 two winning entries of the [Morse
@@ -511,7 +511,7 @@ with the rotors).
 
 For more information see [recode.html][].
 
-BTW: If you need a reminder to go to the gym just do your Enigma ABCs and it
+**BTW**: If you need a reminder to go to the gym just do your Enigma ABCs and it
 should help you remember:
 
 ``` <!---sh-->

2020/ferguson2/index.html

@@ -649,7 +649,7 @@ pairs</a>.</p>
 <div id="example">
 <h4 id="example-run">Example run</h4>
 </div>
-<p>BTW: There’s a much more entertaining way to explore this entry. See
+<p><strong>BTW</strong>: There’s a much more entertaining way to explore this entry. See
 <a href="recode.html">recode.html</a> for more details. There’s a secret message that one might like
 to decipher. These however show the general program as well as how to use the
 two winning entries of the <a href="https://en.wikipedia.org/wiki/Morse_code">Morse
@@ -810,7 +810,7 @@ same applies: in C 0-1 but in human it’s 1-2 (technically these were reflector
 the Enigma machine which I display by name in <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.c">recode.c</a> just like
 with the rotors).</p>
 <p>For more information see <a href="recode.html">recode.html</a>.</p>
-<p>BTW: If you need a reminder to go to the gym just do your Enigma ABCs and it
+<p><strong>BTW</strong>: If you need a reminder to go to the gym just do your Enigma ABCs and it
 should help you remember:</p>
 <pre><code>    $ echo ABC | ./prog
     GYM

2020/ferguson2/recode.html

@@ -914,7 +914,7 @@ think that I would give too much away? :)</p>
     4MU1MS3CA0KECHOLATBJSNPXVUFGZY
     4VW0SL1YB0IYJSLBECKTNAXGPUVHRF
     0MC4OH2CO1LATEUMBJCDFGHINOPRQS</code></pre>
-<p>BTW: what’s the middle of a list with even numbered items anyway?</p>
+<p><strong>BTW</strong>: what’s the middle of a list with even numbered items anyway?</p>
 <p>To help you out, though, this is how you might do the decrypting. Assuming that
 the key you wish to select is</p>
 <pre><code>    0EZ4PC1CC0PGTAQSOXWNMDRYKFUZEI</code></pre>

2020/ferguson2/recode.md

@@ -637,7 +637,7 @@ think that I would give too much away? :)
     0MC4OH2CO1LATEUMBJCDFGHINOPRQS
 ```
 
-BTW: what's the middle of a list with even numbered items anyway?
+**BTW**: what's the middle of a list with even numbered items anyway?
 
 To help you out, though, this is how you might do the decrypting. Assuming that
 the key you wish to select is