commands.
When diffcore-pickaxe is in use, it checks if there are
-filepairs whose "original" side has the specified string and
-whose "result" side does not. Such a filepair represents "the
+filepairs whose "result" side has the specified string and
+whose "origin" side does not. Such a filepair represents "the
string appeared in this changeset". It also checks for the
opposite case that loses the specified string.