ruby/ext/ripper/lib
k0kubun 67bb95936d Fix FrozenError on `Ripper.slice`
Currently `Ripper.slice` raises a FrozenError

```ruby
require 'ripper'
p Ripper.slice('foo', 'ident')
```

```
/path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:193:in `concat': can't modify frozen String (FrozenError)
	from /path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:193:in `block in compile'
	from /path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:190:in `scan'
	from /path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:190:in `compile'
	from /path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:169:in `initialize'
	from /path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:151:in `new'
	from /path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:151:in `token_match'
	from /path/to/g/lib/ruby/2.6.0/ripper/lexer.rb:144:in `slice'
	from /tmp/tmp.kb4cnhvum2/test.rb:2:in `<main>'
```

This patch will fix the problem.

[Fix GH-1837]

From: Masataka Pocke Kuwabara <kuwabara@pocke.me>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62743 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-03-13 12:56:04 +00:00
..
ripper Fix FrozenError on `Ripper.slice` 2018-03-13 12:56:04 +00:00
ripper.rb ripper.rb: fix License format [ci skip] 2017-08-15 00:50:22 +00:00