Fixes in 1986/marshall/compilers.{md,html}

1986/marshall/README.md

@@ -25,7 +25,8 @@ if nothing else.
 
 ## Alternate code:
 
-Due to the different [conflicting problems](compilers.html) with gcc and clang, we
+Due to the different [conflicting problems](compilers.html) with `gcc` and
+`clang`, we
 instead offer the problematic code as an alternate version whereas
 [marshall.c](%%REPO_URL%%/1986/marshall/marshall.c) has both the infinite loop and the complicated arg to
 `_exit()` commented out, changing the value passed into `_exit()` to `1`.