use ui buffering in changeset printer
delete old uibuffer class
delete old stringio class
move show to _show
add new show that uses ui.pushbuffer to buffer
add new flush that writes buffered data
add props arg to changeset_printer to match _templater
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH
hg init a
cd a
hg qnew first.patch
hg qnew first.patch
touch ../first.patch
hg qimport ../first.patch
exit 0