Fix line -> date typo from incomplete splitout of GitBackend._dates().

diff --git a/update_copyright/vcs/git.py b/update_copyright/vcs/git.py
index fd6b85f72e99a68e640c20240d7ea8ae9c2d6d38..1b58ed89057d1acec3c187022ad92e6d51e49bd8 100644 (file)
--- a/update_copyright/vcs/git.py
+++ b/update_copyright/vcs/git.py
@@ -53,7 +53,7 @@ class GitBackend (_VCSBackend):
 
     def _years(self, filename=None):
         dates = self._dates(filename=filename)
-        years = set(int(line.split('-', 1)[0]) for date in dates)
+        years = set(int(date.split('-', 1)[0]) for date in dates)
         return years
 
     def _authors(self, filename=None):