Git Log ignores --oneline and --pretty=oneline in combination with -L.

["Nixon, Francis A" <francis.nixon17@xxxxxxxxxxxxxx>]

 Running `git log --pretty=oneline -L:get_stack_map_frames:stackmapframes.rs`(filename/function names as an example only, consistent across many files.) results on in correct output but doesn't ouput in a oneline format(still includes the full diffs). 

Occurs on `git version 2.26.GIT` (e870325ee8575d5c3d7afe0ba2c9be072c692b65), as well as whatever `git version 2.20.1`.

Francis Nixon