fix pycodestyle issues

Author: sipma

chc/cmdline/c_file/cfileutil.py

@@ -79,7 +79,6 @@
     from chc.proof.CFunctionPO import CFunctionPO
 
 
-
 def print_error(m: str) -> None:
     sys.stderr.write(("*" * 80) + "\n")
     sys.stderr.write(m + "\n")

chc/cmdline/chkc

@@ -1472,9 +1472,12 @@ def parse() -> argparse.Namespace:
         choices=["a", "w"],
         default="a",
         help="file mode for log file: append (a, default), or write (w)")
-    cprojectanalyze.add_argument("-x", "--exclude", action='append',
-        help="Exclude file from analysis. To exclude multiple files, use "
-             "this option for each file, e.g. -x dir1/f1.c, -x dir2/f2.c")
+    cprojectanalyze.add_argument(
+        "-x", "--exclude",
+        action="append",
+        help=(
+            "Exclude file from analysis. To exclude multiple files, use "
+            "this option for each file, e.g. -x dir1/f1.c, -x dir2/f2.c"))
     cprojectanalyze.set_defaults(func=P.cproject_analyze_project)
 
     # --- report