editor: fix replay handling for copied + modified symlinks We strip the 'link ' prefix from symlinks when we store it in Mercurial. We reapply it when we start editing the file via open_file, but not via add_file. this means that modified symlniks would replay correctly, but not copied and modified symlinks. This corrects that ommission.

include Makefile hgsubversion/help/*.rst tests/fixtures/invalid_utf8.tar.gz
recursive-include tests *.py *.sh *.svndump *.txt