largefiles: fix commit of specified file on non-windows

convert: detect false cset boundaries in cvsps descriptions

transplant: wrap a transaction around the whole command

help: generate command help into a single RST string for formatting

help: unify the two -v notes for command help

diff: enhance highlighting with color (issue3034) Now the highlighter knows whether it is in the header of the patch or not.

debuginstall: report the template path

extensions: print some debug info on import failure This is handy if hgext.foo exists but has a bogus "import blah": previously we just discarded the "No module named blah" error. Now at least you can see it with --debug. Not perfect, but better than nothing.