tests/test-hgrc.out

transitive copy/rename

Add support for transitive copy or rename operations, e.g.

    hg rename a b
    ... (possibly edit b)
    hg rename b c
    hg commit ...

by actually renaming "b" as "c" while recording a copy of
"a" to "c" and a removal of "a".

abort: Failed to parse .../t/.hg/hgrc
File contains no section headers.
file: .../t/.hg/hgrc, line: 1
'invalid\n'