The literal blocks were mis-used for alignment, but this of course
changes the font of the entire block to a fixed width font in the HTML
version. Using a proper list solves this.
This fixes an incompatibility with patch(1), which also uses --reverse
for reversed diffs. The --inverse flag was added in 0f0383897d54. That
name was chosen over --reverse since it was thought that --reverse
would make --rev ambiguous.
It turns out that both flags can co-exist, with the cost that --rev
can no longer be shortened to --r and --re. Since one can always use
the short -r option, this is not a real problem.
Most of the time, one can reverse a diff by swapping the revisions passed with
-r but it happens that if you use the global -R, and diff against the tip of
the current repo, you can't swap the revisions. One use-case for that is
reviewing changes from a bundle before unbundling. One could also pipe the
output of `hg diff` to a command line filter that reverses the diff, but that
would remove the benefit from color diffs. Therefore, having an option in
`hg diff` to reverse a diff is a good thing.
The option flag selection was tricky. GNU patch uses -R/--reverse but -R is
already used as a global option and --reverse would make --rev ambiguous.
Normally, diffs without any text insertions or deletions are reported
as having 0 lines changed by stock diffstat. Compatibility is
preserved with stock diffstat in this case, but when using --git,
binary files are marked with Bin as a means of clarification.
git diff --stat does something similar, though it also includes the
old and new file sizes.
diff/qdiff --stat invokes patch.diffstat() on the diff output.
When in interactive mode, the output's maximum width is determined by the
terminal's width.
The existing scheme using util.find_exe and subprocess.call meant we
couldn't use simple shell commands in tests. Fix that.
Also, it mistakenly used status from the system() call rather than
good from the bisect call in reporting results.
The help topics are reused in the HTML documentation, and there it
looks odd that whole sections are indented. We now only indent it for
output on the terminal.
