[PATCH v2 0/5] MR4168: cmd: Handle caret / blocks with whitespace only lines better

[userid0x0 (＠userid0x0)]

This series of patches is heavily inspired by
  https://gitlab.winehq.org/wine/wine/-/merge_requests/277
and solves problems related to
- whitespace only lines in blocks
- EOF in the middle of the blocks
- lines with caret followed by EOF

--
  v2: cmd: Handle whitespace only lines in parentheses blocks - Try 2 Tests
      cmd: Handle whitespace only lines in parentheses blocks - Try 2 Code

https://gitlab.winehq.org/wine/wine/-/merge_requests/4168