tests/histedit-helpers.sh

tests: clarify test setup test in test-uncommit.t

I assume the "hg uncommit b" is there to prove that the working copy
is dirty before we try "hg uncommit --allow-dirty-working-copy b". It
seems clearer to put that check just before we run the actual test.

Differential Revision: https://phab.mercurial-scm.org/D6078

fixbundle() {
    grep -v 'saving bundle' | grep -v 'saved backup' | \
        grep -v added | grep -v adding | \
        grep -v "unable to find 'e' for patching" | \
        grep -v "e: No such file or directory" | \
    cat
}