tests/histedit-helpers.sh

dirstate: factor common update code into _addpath

Factor update code common to all callers of _addpath into _addpath.
By centralizing the update code here, it provides one place to put
updates to new data structures - in a future patch.  It also removes
a few lines of duplicate code.

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"
}