typo fix in command help text This patch fixes a few typo errors on the command help output (I am not sure if the change on 'diff' is the best though).

Minor tweak: os.STOPSIG -> os.WSTOPSIG. Pychecker spotted this one.

Fix .hgignore parsing if last line has no EOL, ignore trailing white space. (and don't use tabs in python code)

Merge with TAH

Addes test for error messages when operating on non-existing files.

Fix tests for new init command

Modify init command to take an optional directory to set up. If the directory does not exist, it is created. If no directory is given, the current directory is used.

Update synopsis for 'hg update', too.

Update online help of hg heads for new --branches option.

Add optional parameter for changed/added/del/unknown files to commands.dodiff This makes it possible to avoid a call into repo.changes if the details of what has changed is already known

Allow the changegroup generator to completely load the buffer. This makes is possible to delete or truncate away revisions and still use the changegroup later.

Add optional stop revision to revlog.heads

Change repo.comit to return None on error or the new revision number on success This allows the caller to correctly record the new revision number

Add force option to repo.commit, allowing commits where no files change