patch: drop unused hunk.newctrl()

test-import-eol: improve binary hunks test

diffhelpers: handle CRLF in hunk last line without EOL Note that diff generation code always ends last lines without newline with a LF, so this is a tolerance.

patch: drop eol normalization fast-path for 'lf' and 'crlf' With eolmode set to 'lf' or 'crlf' we avoided the hunk duplication and normalization by reading the input patch in text mode. Dropping this optimization simplifies code expectations for a small overhead. The change in test-mq-eol comes from a tolerance to CRLF instead of LF for last lines without newlines being broken by this revision. This tolerance was only partially supported and will be added again in a better way.

patch: fix eolmode=auto with new files If target file does not exist or has no eol, current code was normalizing eols to LF. Preserve patch file eols instead.

Merge with stable

tests highlight, keyword: load extensions with "ext ="

setup.py: keep Python 2.3 compatibility Though we only support Python 2.4 or greater, we should keep setup.py compatible with earlier versions on the syntactic level. Otherwise people will simply get a SyntaxError when trying to install Mercurial with an old version of Python. With this change, the setup.py file can be imported with Python 2.3 and we then issue a friendly error message when we detect that Python is too old.

Merge with stable

extensions help: make disabling example analogous to enabling example The example for enabling an extension in the module search path is: foo = foo can only be disabled by: foo = ! and not by: hgext.foo = ! As the examples now omit "hgext." the example hgext.bar = ! is misleading.