convert_git: avoid returning two entries for the same file in getchanges
This could happen in merge changesets if the merged file was different
from both parents.
#!/bin/sh# a test for issue586hg init acd aecho a > ahg ci -Amahg init ../bcd ../becho b > bhg ci -Ambhg pull -f ../ahg mergehg rm -f ahg ci -Amchg st -A