convert/svn: make svn sink work with svn 1.7 "svn add file" now fails if "file" is already tracked. To filter them we have to mirror the svn manifest in the sink. Tested with svn 1.6.12 and 1.7.4.

docs: don't use :hg: at the beginning of lines in notes (issue3397) It seem like docutils 0.8 interpret ':hg:`command`' roles at the beginning of indented lines in '.. note::' directives as a field that is an invalid argument to the directive. It fails with 'Error in "note" directive: invalid option block.' Docutils 0.7 accepted this arguably incorrect markup. Reflowing the text makes the problem go away. A leading '\ ' could perhaps also be used to mask the problem.