- drop stray duplicate empty lines in docs, scripts, test data, include,
examples, tests.
- drop duplicate PP parenthesis.
- curl-functions.m4: move literals to the right side in if expressions,
to match rest of the source code.
- FAQ.md: delete language designator from an URL.
- packages: apply clang-format (OS400, VMS).
- scripts/schemetable.c: apply clang-format.
- data320: delete duplicate empty line that doesn't change the outcome.
- spacecheck: extend to check for duplicate empty lines
(with exceptions.)
- fix whitespace nits
Closes#19936
To make the test files XML-compliant, and the expected results
possibly easier to manage by keeping them in `.md`, `.html`, `.1`
and `.txt` files.
Non-XML-compliant files are down to 31 (1.6%) after this patch.
Closes#19882
