view .hg-format-source @ 5023:abefd37c6afa stable

evolve: add test to demonstrate a bug when active topic is empty

Added test shows that when current active topic is empty and we try
to run `hg up`, it fails with an error. It's because this case is not
correctly handled when we find a destination to update (when topics
are in play)

Next patch will fix this.

{"pattern": "glob:hgext3rd/**/*.py", "tool": "byteify-strings"}