Flush stderr after write.
stderr can be buffered under win32 when redirected to a file,
including stdout.
#!/bin/sh
hg init
echo a > a
hg ci -d '0 0' -Ama
hg an a
echo "[ui]" >> $HGRCPATH
echo "strict=True" >> $HGRCPATH
hg an a
hg annotate a
echo % should succeed - up is an alias, not an abbreviation
hg up