patch 9.0.1951: Vim9: hard to debug vim9_class errors from CI Commit: https://github.com/vim/vim/commit/b90e3bc491c02bd6e4db1a1c1849ce3d21811c43 Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Thu Sep 28 23:06:48 2023 +0200 patch 9.0.1951: Vim9: hard to debug vim9_class errors from CI Problem: Vim9: hard to debug vim9_class errors from CI Solution: Include the line number in assert_xxx() calls. Include the entire error message in the tests. Fix the indentation in the test file. Add tags for new error codes. closes: #13206 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>