* ext/psych/lib/psych/scalar_scanner.rb: Fix scalar_scanner to

understand strings starting with an underscore and containing only
  digits.  Thanks Kelley Reynolds.

* test/psych/test_scalar_scanner.rb: test for fix

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37287 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Tue Oct 23 06:04:07 2012  Aaron Patterson <aaron@tenderlovemaking.com>
+
+	* ext/psych/lib/psych/scalar_scanner.rb: Fix scalar_scanner to
+	  understand strings starting with an underscore and containing only
+	  digits.  Thanks Kelley Reynolds.
+
+	* test/psych/test_scalar_scanner.rb: test for fix
+
 Tue Oct 23 06:00:41 2012  Aaron Patterson <aaron@tenderlovemaking.com>
 
 	* ext/psych/lib/psych.rb: Changed comment in psych.rb to update new

ext/psych/lib/psych/scalar_scanner.rb

@@ -24,7 +24,7 @@ module Psych
       return string if @string_cache.key?(string)
 
       case string
-      when /^[A-Za-z~]/
+      when /^[A-Za-z_~]/
         if string.length > 5
           @string_cache[string] = true
           return string

test/psych/test_scalar_scanner.rb

@@ -87,5 +87,9 @@ module Psych
     def test_scan_true
       assert_equal true, ss.tokenize('true')
     end
+
+    def test_scan_strings_starting_with_underscores
+      assert_equal "_100", ss.tokenize('_100')
+    end
   end
 end