tests/histedit-helpers.sh

config: also gather effect-flags on experimental.evolution

Effect-flags config was in flight while the previous evolve config renaming
was written. Now that both landed, gather effect-flags in
experimental.evolution like the others evolve-related configurations.

Differential Revision: https://phab.mercurial-scm.org/D1197

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
}