Enhance gitdiffs help text

Kill trailing whitespace in templates

graphlog: move functions around, eliminate helper function Makes it easier to read all of the code.

graphlog: split the actual DAG grapher out into a separate method This allows extensions like pbranch to use asciigraph() to graph dependencies for patch branches, but could be used for basically any DAG.

graphlog: rename some vars prior to refactoring

graphlog: make some comment lines more like others in punctuation

patchbomb: fix indentation

patchbomb: move exportee class to top level As suggested by djc.

ui: log non-interactive default response to stdout when verbose This allows test scripts that feed their output into documentation to properly show the session as it would appear to an end-user.

export: fixed silent output file overwriting hg export -o outfile 1 2 3 4 had the same effect as hg -o outfile 4 This was caused by opening with 'w' instead of 'a'. This only occurs when the filename pattern resulted in ambiguous patch filenames.

merge bookmarks

bookmarks: Test if rebase works with bookmarks Add a test that tests if rebase works fine with bookmarks.