test-context.py: Don't create second repo instance (fixed since 7b5723c95a82)

fancyopts: Copy list arguments in command table before modifying. Before this, executing commands.dispatch(['log', '-r', '0']) commands.dispatch(['log', '-r', 'tip']) would look like: hg log -r 0 hg log -r 0 -r tip Reported by TK Soh, patch by Alexis S. L. Carvalho

Print less scary message if the system supports symlinks: "Skipping test-no-symlinks: system supports symbolic links" instead of "Skipping test-no-symlinks: unexpected feature: symbolic links"

Hide absolute path from test-no-symlinks output. And add missing eol and remove trailing space which where introduced by the patches adding this test.