Apply suggestions from code review

Co-Authored-By: Mathias Goncalves <[email protected]>

Author: oesteban

docs/usage.rst

@@ -105,7 +105,7 @@ Reusing precomputed derivatives
 -------------------------------
 Reusing a previous, partial execution of *fMRIPrep*
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-*fMRIPrep* will pick up where it left off a previous execution, so long the work directory
+*fMRIPrep* will pick up where it left off a previous execution, so long as the work directory
 points to the same location, and this directory has not been changed/manipulated.
 
 Using a previous run of *FreeSurfer*

wrapper/fmriprep_docker.py

@@ -164,15 +164,15 @@ def merge_help(wrapper_help, target_help):
 
     # Make sure we're not clobbering options we don't mean to
     overlap = set(w_flags).intersection(t_flags)
-    expected_overlap = set([
+    expected_overlap = {
         'anat-derivatives',
         'fs-license-file',
         'fs-subjects-dir',
         'h',
         'use-plugin',
         'version',
         'w',
-    ])
+    }
 
     assert overlap == expected_overlap, "Clobbering options: {}".format(
         ', '.join(overlap - expected_overlap))