parse.y: Fix locations of string

* parse.y: Fix to include locations of tSTRING_BEG and tSTRING_END.

  e.g. The locations of the NODE_STR is fixed:

  ```
  "a"
  ```

  * Before

  ```
  NODE_STR (line: 1, code_range: (1,1)-(1,2))
  ```

  * After

  ```
  NODE_STR (line: 1, code_range: (1,0)-(1,3))
  ```

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61072 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index 12d278a131..e18c50c194 100644
--- a/parse.y
+++ b/parse.y
@@ -3942,6 +3942,10 @@ string		: tCHAR
 string1		: tSTRING_BEG string_contents tSTRING_END
 		    {
 			$$ = new_string1(heredoc_dedent($2));
+		    /*%%%*/
+			if ($$) nd_set_loc($$, &@$);
+		    /*%
+		    %*/
 		    }
 		;