fetch: linearize code by eliminating nested functions

qimport: report filename in case of IOError The old behaviour was to say "abort: unable to read" since the patchname variable was always None.

Fix wrong redirection in test-rebase-parameters

highlight: split code to improve startup times

qfinish: document --applied instead of --all

Merge with Gilles Moris

Have verbose and debug flag print the changeset rev and hash when committing. Besides updating the tests output, I had to push back at the end the test for issue1193 in test-commit, solved by cset 4386a7706828, because it was using the current date for commit and was randomizing the subsequent hash.