Adrian Buehlmann <adrian@cadifra.com> [Tue, 02 Aug 2011 13:18:56 +0200] rev 15011
util: move copymode into posix.py and windows.py
reducing it to a NOP on Windows.
This eliminates a pointless stat call on Windows and reduces the risk of
interferring with other processes (e.g. AV-scanners, file change watchers).
See also http://mercurial.selenic.com/wiki/UnlinkingFilesOnWindows, item 2d