tests/histedit-helpers.sh

tests: dump journal file by python script instead of sed for portability

Before this patch, test-repair-strip.t fails on Solaris, because of
"sed" on it doesn't work as expected if input contains null ('\0')
character.

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
}