Add new predefined constants from 1.9

Author: dkearns

syntax/ruby.vim

@@ -117,11 +117,9 @@ syn match rubyPredefinedVariable "$-[0FIKadilpvw]\>"									   display
 syn match rubyPredefinedVariable "$\%(deferr\|defout\|stderr\|stdin\|stdout\)\>"					   display
 syn match rubyPredefinedVariable "$\%(DEBUG\|FILENAME\|KCODE\|LOADED_FEATURES\|LOAD_PATH\|PROGRAM_NAME\|SAFE\|VERBOSE\)\>" display
 syn match rubyPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(MatchingData\|ARGF\|ARGV\|ENV\)\>\%(\s*(\)\@!"
-syn match rubyPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(DATA\|FALSE\|NIL\|RUBY_PLATFORM\|RUBY_RELEASE_DATE\)\>\%(\s*(\)\@!"
-syn match rubyPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(RUBY_VERSION\|STDERR\|STDIN\|STDOUT\|TOPLEVEL_BINDING\|TRUE\)\>\%(\s*(\)\@!"
-"Obsolete Global Constants
-"syn match rubyPredefinedConstant "\%(::\)\=\zs\%(PLATFORM\|RELEASE_DATE\|VERSION\)\>"
-"syn match rubyPredefinedConstant "\%(::\)\=\zs\%(NotImplementError\)\>"
+syn match rubyPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(DATA\|FALSE\|NIL\)\>\%(\s*(\)\@!"
+syn match rubyPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(STDERR\|STDIN\|STDOUT\|TOPLEVEL_BINDING\|TRUE\)\>\%(\s*(\)\@!"
+syn match rubyPredefinedConstant "\%(\%(\.\@<!\.\)\@<!\|::\)\_s*\zs\%(RUBY_\%(VERSION\|RELEASE_DATE\|PLATFORM\|PATCHLEVEL\|REVISION\|DESCRIPTION\|COPYRIGHT\|ENGINE\)\)\>\%(\s*(\)\@!"
 
 " Normal Regular Expression
 syn region rubyRegexp matchgroup=rubyRegexpDelimiter start="\%(\%(^\|\<\%(and\|or\|while\|until\|unless\|if\|elsif\|when\|not\|then\|else\)\|[;\~=!|&(,[>?:]\)\s*\)\@<=/" end="/[iomxneus]*" skip="\\\\\|\\/" contains=@rubyRegexpSpecial keepend fold
@@ -198,7 +196,7 @@ syn match   rubyControl	       "\<\%(and\|break\|in\|next\|not\|or\|redo\|rescue
 syn match   rubyOperator       "\<defined?" display
 syn match   rubyKeyword	       "\<\%(super\|yield\)\>[?!]\@!"
 syn match   rubyBoolean	       "\<\%(true\|false\)\>[?!]\@!"
-syn match   rubyPseudoVariable "\<\%(nil\|self\|__FILE__\|__LINE__\)\>[?!]\@!"
+syn match   rubyPseudoVariable "\<\%(nil\|self\|__ENCODING__\|__FILE__\|__LINE__\|__callee__\|__method__\)\>[?!]\@!" " TODO: reorganise
 syn match   rubyBeginEnd       "\<\%(BEGIN\|END\)\>[?!]\@!"
 
 " Expensive Mode - match 'end' with the appropriate opening keyword for syntax