obshistory: omit duplicate notes of obsolescence operations When folding changesets, it's possible to provide a --note flag to e.g. fold or prune, which will store a note for that operation. But since there would be more than one marker for the fold operation and the provided note would be stored in all of them, _markersnotes() previously would return the same text message many times. We don't really want to see the same thing over and over, so let's make notes a set(). This will also make unrelated operations with the same note show the message only once, which is probably an improvement too.

# utility to setup pythonpath to point into the tested repository

export SRCDIR="`dirname $TESTDIR`"
if [ -n "$PYTHONPATH" ]; then
    export HGTEST_ORIG_PYTHONPATH=$PYTHONPATH
    if uname -o 2> /dev/null | grep -q Msys; then
        export PYTHONPATH="$SRCDIR;$PYTHONPATH"
    else
        export PYTHONPATH=$SRCDIR:$PYTHONPATH
    fi
else
    export PYTHONPATH=$SRCDIR
fi