Change references of 'alt code' to 'alternate code'

This was done by:

    sgit -e 's/alt code/alternate code/g' . ; git co tmp/OLD_manifest

as well as updating the tmp/manifest.numbers spreadsheet and exporting
to the CSV file (though that would not strictly be necessary).

The way this works means that the update manifest script does not need
to be run as it sgit(1) touched the .entry.json files (any that needed
to be updated) and so would any index.html files. An example for both
.entry.json and index.html files being modified due to manifest is
2012/kang.

Numerous Makefiles were updated, any try scripts that had 'alt code'
instead of 'alternate code' and README.md/index.html files (unrelated to
the manifest as 'alt code' was used in other places too) and obviously
the manifest.numbers spreadsheet.

However to be safe I will do a run of the manifest script in a bit even
though it should not be necessary. If no commits are made it means all
is good and if any commits are made for the manifest it means that I
did not think of something (or else I made another change after this).

2006/monge/Makefile

@@ -146,7 +146,7 @@ ${PROG}: ${PROG}.c
 alt: data ${ALT_TARGET}
 	@${TRUE}
 
-# Variables to control width, height and iterations in alt code
+# Variables to control width, height and iterations in alternate code
 #
 WIDTH= 400
 HEIGHT= 300

2006/monge/try.alt.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# try.alt.sh - demonstrate IOCCC entry 2006/monge alt code
+# try.alt.sh - demonstrate IOCCC entry 2006/monge alternate code
 #
 
 # make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it

2006/sloane/Makefile

@@ -142,7 +142,7 @@ ${PROG}: ${PROG}.c
 alt: data ${ALT_TARGET}
 	@${TRUE}
 
-# Variable to control amount of time to sleep between writes for alt code.
+# Variable to control amount of time to sleep between writes for alternate code.
 #
 SLEEP= 75000
 ${PROG}.alt: ${PROG}.alt.c

2006/sykes1/README.md

@@ -43,7 +43,7 @@ You might also try:
     ./try.sh
 ```
 
-This will run both the original entry and the alt code to show some differences.
+This will run both the original entry and the alternate code to show some differences.
 
 
 ### Also try:

2006/sykes1/index.html

@@ -418,7 +418,7 @@ specifically see the <a href="#alternate-code">Alternate code</a> section below.
 <p>Refresh your browser.</p>
 <p>You might also try:</p>
 <pre><code>    ./try.sh</code></pre>
-<p>This will run both the original entry and the alt code to show some differences.</p>
+<p>This will run both the original entry and the alternate code to show some differences.</p>
 <h3 id="also-try">Also try:</h3>
 <p>If you have all day :-) and wish to find out how fast your machine can solve the
 maximum:</p>