patch 8.2.1468: Vim9: invalid error for missing white space

Problem:    Vim9: invalid error for missing white space.
Solution:   Don't skip over white space after index. (closes #6718)
diff --git a/src/eval.c b/src/eval.c
index 37ed515..3c4a8c5 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -3624,7 +3624,7 @@
 		clear_tv(&var2);
 	    return FAIL;
 	}
-	*arg = skipwhite(*arg + 1);	// skip the ']'
+	*arg = *arg + 1;	// skip over the ']'
     }
 
     if (evaluate)
diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index 01ac3e6..ee68537 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -827,6 +827,13 @@
     echo len('xxx') == 3
   END
   CheckScriptSuccess(lines)
+
+  lines =<< trim END
+    vim9script
+    let line = 'abc'
+    echo line[1] =~ '\w'
+  END
+  CheckScriptSuccess(lines)
 enddef
 
 func Test_expr4_fails()
diff --git a/src/version.c b/src/version.c
index c8794ce..19a8704 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1468,
+/**/
     1467,
 /**/
     1466,