The ID of a grammatical feature is shown in a Lexeme diff. This is confusing and the user should not care about this ID.
It should only say "Form L1-F1 / grammatical feature", without the "/ 0" or "/ 1" at the end.
GIVEN I am on a diff page
WHEN a diff of grammatical features on a lexeme is presented
THEN no "grammatical feature" id is shown in the diff "breadcrumb"