manifest: now that there's only one legacy.py, exclude it
After the last patch, this file is only included because of package_dir in
setup.py (i.e. just once), so we can ignore it with just one clause. But
package_dir starts with "./", so we need to add it to the pattern.
--- a/MANIFEST.in Thu Apr 09 23:41:55 2020 +0800
+++ b/MANIFEST.in Fri Apr 10 10:13:48 2020 +0800
@@ -18,7 +18,7 @@
exclude docs/tutorial/.netlify
exclude .gitlab-ci.yml
-exclude hgext3rd/evolve/legacy.py
+exclude ./hgext3rd/evolve/legacy.py
exclude .hg-format-source
exclude Makefile
exclude tests/test-drop.t