ENH: Adopt str.removesuffix()

Author: effigies

nibabel/brikhead.py

@@ -555,7 +555,7 @@ def filespec_to_file_map(klass, filespec):
             fname = fholder.filename
             if key == 'header' and not os.path.exists(fname):
                 for ext in klass._compressed_suffixes:
-                    fname = fname[: -len(ext)] if fname.endswith(ext) else fname
+                    fname = fname.removesuffix(ext)
             elif key == 'image' and not os.path.exists(fname):
                 for ext in klass._compressed_suffixes:
                     if os.path.exists(fname + ext):

nibabel/filename_parser.py

@@ -111,8 +111,7 @@ def types_filenames(
     template_fname = _stringify_path(template_fname)
     if not isinstance(template_fname, str):
         raise TypesFilenamesError('Need file name as input to set_filenames')
-    if template_fname.endswith('.'):
-        template_fname = template_fname[:-1]
+    template_fname = template_fname.removesuffix('.')
     filename, found_ext, ignored, guessed_name = parse_filename(
         template_fname, types_exts, trailing_suffixes, match_case
     )