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diff: add --inverse option...

diff: add --inverse option 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.

Martin Geisler - - Load All Authors

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      #!/usr/bin/env python

      #

      # Copyright 2009 Matt Mackall <mpm@selenic.com> and others

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2, incorporated herein by reference.

      """prints repr(sys.stdin) but preserves newlines in input"""

      import sys

      print repr(sys.stdin.read())[1:-1].replace('\\n', '\n'),

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				#!/usr/bin/env python
				#
				# Copyright 2009 Matt Mackall <mpm@selenic.com> and others
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2, incorporated herein by reference.

				"""prints repr(sys.stdin) but preserves newlines in input"""

				import sys
				print repr(sys.stdin.read())[1:-1].replace('\\n', '\n'),