Fix omnicompletion issue with sorting symbols

Author: AndrewRadev

autoload/rubycomplete.vim

@@ -771,10 +771,10 @@ class VimRubyCompletion
     constants = clean_sel( constants, message )
 
     valid = []
-    valid += methods.collect { |m| { :name => m, :type => 'm' } }
-    valid += variables.collect { |v| { :name => v, :type => 'v' } }
-    valid += classes.collect { |c| { :name => c, :type => 't' } }
-    valid += constants.collect { |d| { :name => d, :type => 'd' } }
+    valid += methods.collect { |m| { :name => m.to_s, :type => 'm' } }
+    valid += variables.collect { |v| { :name => v.to_s, :type => 'v' } }
+    valid += classes.collect { |c| { :name => c.to_s, :type => 't' } }
+    valid += constants.collect { |d| { :name => d.to_s, :type => 'd' } }
     valid.sort! { |x,y| x[:name] <=> y[:name] }
 
     outp = ""