Listify the echo index.

Author: tsalo

fmriprep/utils/bids.py

@@ -332,7 +332,8 @@ def dismiss_echo(entities=None):
     if entities is None:
         entities = []
 
-    if (config.execution.echo_idx is None) or (len(config.execution.echo_idx) > 2):
+    echo_idx = config.execution.echo_idx
+    if (echo_idx is None) or (len(listify(echo_idx)) > 2):
         entities.append("echo")
 
     return entities