Raising a TypeError exception in String#concat when the argument is not valid
String cannot be concatenated with a Symbol
Added specs to concat strings with symbol
MRI 1.8 Fix - String cannot be concatenated with a Symbol
Fixing indentation
Merge branch 'issue-1177-string-concat' of github.com:lucasallan/jruby into lucasallan-issue-1177-string-concat
Merge branch 'jruby-1_7'

Conflicts:
	core/src/main/java/org/jruby/RubyString.java
	test/externals/ruby1.8/ruby/test_string.rb
	test/externals/ruby1.9/ruby/test_string.rb