https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280434
Bug ID: 280434
Summary: diff(1) man-page (and no-param help) documents
--ignore-all-blanks but option is named
--ignore-all-space
Product: Documentation
Version: Latest
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: Manual Pages
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
The man page documents an "--ignore-all-blanks" flag
$ man diff | ul -t dumb | grep -e '-w.*ignore'
-w --ignore-all-blanks
as does the help
$ diff 2>&1 | grep 'ignore-all'
diff [-aBbditwW] [--expand-tabs] [--ignore-all-blanks]
however there is no --ignore-all-blanks option. According to the source
(usr.bin/diff/diff.c:107) there's an --ignore-all-space option which is the
synonym for the -w option (like what the man-page describes).
So the man-page conflicts with the source code (which is also conflicts with
itself)
$ grep ignore-all /usr/src/usr.bin/diff/diff.c
{ "ignore-all-space", no_argument, 0, 'w' },
" diff [-aBbditwW] [--expand-tabs] [--ignore-all-blanks]\n"
FWIW, GNU diff(1) uses --ignore-all-space not --ignore-all-blanks if you're
looking for a nudge favoring one vs the other.
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