changing the approach from the wildcard match to the true specified multi-line match for exunit and shouldi exeception messages

Author: Michael Cowgill

compiler/exunit.vim

@@ -14,15 +14,15 @@ endif
 
 let s:cpo_save = &cpo
 set cpo-=C
-
 CompilerSet makeprg=mix\ test
 CompilerSet errorformat=
- \**\ (%\\w%\\+)\ %f:%l:\ %m,
- \%+Z\ \ \ \ \ \ \ %f:%l,
- \%+G%>\ \ \ \ \ \ \ (%\\w%\\+)\ %f:%l:\ %m,
  \%E\ \ %n)\ %m,
+ \%+G\ \ \ \ \ **\ %m,
+ \%+G\ \ \ \ \ stacktrace:,
  \%C\ \ \ \ \ %f:%l,
- \%+G%.%#
+ \%+G\ \ \ \ \ \ \ (%\\w%\\+)\ %f:%l:\ %m,
+ \%+G\ \ \ \ \ \ \ %f:%l:\ %.%#,
+ \**\ (%\\w%\\+)\ %f:%l:\ %m
 
 let &cpo = s:cpo_save
 unlet s:cpo_save