Propertize character literals and special global variables differently

* lisp/progmodes/ruby-mode.el (ruby-syntax-propertize): Propertize
character literals and global variables with special names with
prefix and symbol syntax classes, for SMIE to tokenize them
together automatically.
(ruby-font-lock-keywords): Fix an old regression in highlighting
character literals.

1 files changed, 3 insertions, 0 deletions

diff --git a/test/indent/ruby.rb b/test/indent/ruby.rb
index 3fdb68064be..522c3bd5465 100644
--- a/test/indent/ruby.rb
+++ b/test/indent/ruby.rb
@@ -174,6 +174,9 @@ qux :+,
     bar,
     :a
 
+b = $:
+c = ??
+
 # Example from http://www.ruby-doc.org/docs/ProgrammingRuby/html/language.html
 d = 4 + 5 +      # no '\' needed
     6 + 7