Broader ruby function highlighting

vim/after/syntax/ruby.vim

@@ -1,4 +1,4 @@
-syn match _rubyFunction /\(\.\)\@<=\w\+\((\)\@=/
+syn match _rubyFunction /\(\.\|\s\|^\)\@<=\w\+\((\)\@=/
 hi link _rubyFunction Function
 
 syn region rubyBlockParameterList matchgroup=Operator start="\%(\%(\<do\>\|{\)\_s*\)\@32<=|" end="|" oneline display contains=rubyBlockParameter