Merge pull request #1667 from TheHX/fix_multiline_strings

Now the script editor highlight all lines of a multiline string

modules/gdscript/gd_editor.cpp

@@ -33,7 +33,7 @@
 void GDScriptLanguage::get_comment_delimiters(List<String> *p_delimiters) const {
 
 	p_delimiters->push_back("#");
-	p_delimiters->push_back("\"\"\"");
+	p_delimiters->push_back("\"\"\" \"\"\"");
 
 }
 void GDScriptLanguage::get_string_delimiters(List<String> *p_delimiters) const {