Fixed tiny bug where starting Diakonos with a nonexistent filename caused the /usr/bin/file code to get confused.

diakonos

@@ -3296,7 +3296,7 @@ class Diakonos
             # Is file readable?
             
             # Does the "file" utility exist?
-            if FileTest.exist? "/usr/bin/file" and filename != nil
+            if FileTest.exist?( "/usr/bin/file" ) and filename != nil and FileTest.exist?( filename )
                 file_type = `/usr/bin/file -L #{filename}`
                 if file_type !~ /text/
                     choice = getChoice(

diakonos.conf

@@ -347,7 +347,7 @@ lang.html_tag.tokens.symbols.format white
 
 # Ruby
 
-lang.ruby.filemask \.rb$
+lang.ruby.filemask \.(?:rb|gem(?:spec)?)$
 lang.ruby.bangmask ruby
 lang.ruby.format.default white bold
 lang.ruby.format.selection inverse