- Check that all backslashes in EXAMPLE are properly escaped.
eg manpage must always use `\\n` never `\n`.
This is because the manpage requires we always double blackslash to show
a single backslash. Prior to this change an erroneous single backslash
would pass through and compile even though it would not show correctly
in the manpage.
Co-authored-by: Daniel Stenberg
Ref: https://github.com/curl/curl/pull/12588
Closes https://github.com/curl/curl/pull/12589