STY: Apply ruff/flynt rule FLY002

FLY002 Consider f-string instead of string join

Author: DimitriPapadopoulos

niworkflows/interfaces/bids.py

@@ -604,7 +604,7 @@ def _run_interface(self, runtime):
             # Example: f"{key}-{{{key}}}" -> "task-{task}"
             custom_pat = '_'.join(f'{key}-{{{key}}}' for key in sorted(custom_entities))
             patterns = [
-                pat.replace('_{suffix', '_'.join(('', custom_pat, '{suffix'))) for pat in patterns
+                pat.replace('_{suffix', f'_{custom_pat}_{{suffix') for pat in patterns
             ]
 
         # Build the output path(s)
@@ -1109,7 +1109,7 @@ def _run_interface(self, runtime):
             # Example: f"{key}-{{{key}}}" -> "task-{task}"
             custom_pat = '_'.join(f'{key}-{{{key}}}' for key in sorted(custom_entities))
             patterns = [
-                pat.replace('_{suffix', '_'.join(('', custom_pat, '{suffix'))) for pat in patterns
+                pat.replace('_{suffix', f'_{custom_pat}_{{suffix') for pat in patterns
             ]
 
         # Prepare SimpleInterface outputs object

niworkflows/utils/spaces.py

@@ -722,7 +722,7 @@ def __call__(self, parser, namespace, values, option_string=None):
                 # relevant discussions:
                 # https://github.com/nipreps/niworkflows/pull/457#discussion_r375510227
                 # https://github.com/nipreps/niworkflows/pull/494
-                val = ':'.join((val, 'res-native'))
+                val = f'{val}:res-native'
             for sp in Reference.from_string(val):
                 spaces.add(sp)
         setattr(namespace, self.dest, spaces)