Reported error for comment after an indented let=<<

[Aster89]

Copied from https://github.com/vim/vim/issues/11642 / https://github.com/ycm-core/lsp-examples/issues/33

Steps to reproduce

1. Open a vimscript file and fill it with the following content:

   fun SomeFun()
   let text =<< trim END
   Some text
   END
   endf
   " a comment

2. Observe the syntax coloring of "
3. Hit EscapeGAEnterEnter.
4. See the error.

Here's a screencast:

---

Note there's nothing after the closing END and there's as much space before as before let. This is consistent with let {var-name} =<< [trim] [eval] {endmarker}'s documentation, specifically

The last line should end only with the {endmarker} string without any other character.

and

The marker must line up with "let".

Expected behaviour

Correct syntax coloring and no error.

Version of Vim

9.0 patch 1-910

Environment

Operating system: up-to-date Archlinux Terminal: URxvt Value of $TERM: rxvt-unicode-256color Shell: Bash

[iamcco]

vimlparser bug https://github.com/vim-jp/vim-vimlparser/issues/188

[iamcco]

Close https://github.com/iamcco/vim-language-server/commit/f6e1808e441c64f47f6fb86886eb9ad5a4e74156