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;