GUI - improve syntax indentation

Previously if a map contained the key do: it would indent the subsequent lines as if the do was a keyword. This is now fixed.

{do: 54, foo: 3}
# this line is now correctly indented

Author: samaaron

app/server/ruby/vendor/ruby-beautify/lib/ruby-beautify/config/ruby.rb

@@ -5,6 +5,7 @@
   ruby = RBeautify::Language.add_language(:ruby)
 
   pre_keyword_boundary = '(^|[^a-z0-9A-Z:._])' # like \b but with : , . _ all added to list of exceptions
+  post_keyword_boundary = '([^a-z0-9A-Z:_]|$)' # like \b but with : _ added to list of exceptions
   start_statement_boundary = '(^|(;|=)\s*)'
   continue_statement_boundary = '(^|;\s*)'
   ruby.indent_size = 2
@@ -51,7 +52,7 @@
                    :nest_except => [:double_quote, :single_quote, :regex, :back_tick])
 
   ruby.add_matcher(:standard,
-                   /((#{start_statement_boundary}(module|class|def))|#{pre_keyword_boundary}do)\b/,
+                   /((#{start_statement_boundary}(module|class|def))|#{pre_keyword_boundary}do#{post_keyword_boundary})/,
                    /(((^|;|\s)end)|#{continue_statement_boundary}(rescue|ensure))\b/,
                    :nest_except => [:double_quote, :regex, :backtick])