Fixing message.

scripts/copypaste_bigwig_regions.py

@@ -92,7 +92,7 @@ def main():
     from_region = region_extractor(config["from_region"])
     to_region = region_extractor(config["to_region"])
     print(f"Copying {from_region} of {config['from_bw']} "
-          "into {to_region} of {config['to_bw']}")
+          f"into {to_region} of {config['to_bw']}")
     paste_bigwig_region(
         config["from_bw"], config["to_bw"],
         from_region, to_region,