mdiff: split lines in allblocks() only when necessary These are only required to handle the --ignore-blank-lines case

annotate: support diff whitespace filtering flags (issue3030) splitblock() was added to handle blocks returned by bdiff.blocks() which differ only by blank lines but are not made only of blank lines. I do not know exactly how it could happen but mdiff.blocks() threshold behaviour makes me think it can if those blocks are made of very popular lines mixed with popular blank lines. If it is proven to be wrong, the function can be dropped. The first implementation made annotate share diff configuration entries. But it looks like users will user -w/b for annotate but not for diff, on both the command line and hgweb. Since the latter cannot use command line entries, we introduce a new [annotate] section duplicating the diff whitespace options.

setup: fix py2exe generation broken by c3a6ec304055 (issue3116) Py2exe is patching default distutils Distribution class. This patch ensures that the right one is taken when calling hgdist class.

mdiff: make diffblocks() return all blocks, matching and changed Annotate uses matching blocks not changed ones.

mdiff: extract blocks whitespace normalization in diffblocks() We want to reuse it in annotate for whitespace normalization.

merge with crew

setup: backout 8504699d1aa6 Change wasn't compatible with Python 2.x

tests: don't use stdout redirection for test data Stdout redirection is not binary safe everywhere - for example not on windows with msys.

tests: hide 'No such file or directory' messages Windows will use a different and localized message.

tests: add missing '(glob)'s to match '\' in paths in test output on windows