commit https://github.com/vim/vim/commit/28b942a064dd486cc241894b625ab72f5a5c6d1b Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 4 22:31:27 2016 +0200 patch 7.4.1900 Problem: Using CTRL-] in the help on "{address}." doesn't work. Solution: Recognize an item in {}. (Hirohito Higashi, closes https://github.com/vim/vim/issues/814)

--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -6216,6 +6216,9 @@ find_help_tags(
 	     */
 	    if (*s == '\'' && s > arg && *arg == '\'')
 		break;
+	    /* Also '{' and '}'. */
+	    if (*s == '}' && s > arg && *arg == '{')
+		break;
 	  }
 	  *d = NUL;