- replace tabs with spaces where possible
- remove line ending spaces
- remove double/triple newlines at EOF
- fix a non-UTF-8 character
- cleanup a few indentations/line continuations
in manual examples
Closes https://github.com/curl/curl/pull/3037
Instead of claiming it is an error, we call it a "note" to reduce the
severity level. But the following text now says the [variable] "*should*
only be used to specify"... instead of previously having said "may".