Problem: Strange error when heredoc marker starts with "trim".
Solution: Check for whitespace after "trim" or "eval" (zeertzjq)
For :python3 etc., a heredoc marker that starts with a lower-case letter
is valid, and when it starts with "trim" it works in a script but not in
a function, and this PR makes it works in a function.
For :let, a heredoc marker that starts with a lower-case letter is not
valid, but when it starts with "trim" or "eval" the error can be a bit
confusing in a function, and this PR make it less confusing.
closes: vim/vim#16574449c2e5454
Problem: Heredoc in scripts does not accept lower case marker.
Solution: Allow lower case only in non-Vim scripts. (Ken Takata,
closesvim/vim#6019)
6ab0953fef
Problem: Heredoc for interfaces does not support "trim".
Solution: Update the script heredoc support to be same as the :let command.
(Yegappan Lakshmanan, closesvim/vim#5916)
6c2b7b8055