Fixed PEP8 in count_lines.py (cyberbotics#6537)

* Fixed PEP8 in count_lines.py

* Update count_lines.py

* Update count_lines.py

* Update count_lines.py

Author: omichel

scripts/count_lines/count_lines.py

@@ -1,6 +1,25 @@
+#!/usr/bin/env python3
+
+# Copyright 1996-2023 Cyberbotics Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Display the number of lines of codes in this repository for different programming languages."""
+
 import glob
 import os
 
+
 def count_lines(filename):
     f = open(filename, 'rb')
     lines = 0
@@ -12,6 +31,7 @@ def count_lines(filename):
         buf = read_f(buf_size)
     return lines
 
+
 def count_files(extensions, name):
     line_counter = 0
     file_counter = 0
@@ -24,6 +44,7 @@ def count_files(extensions, name):
             line_counter += count_lines(f)
     print((name + ':').ljust(12) + str(line_counter).ljust(6) + ' lines of codes in ' + str(file_counter).ljust(4) + ' files')
 
+
 count_files(['cpp', 'hpp'], 'C++')
 count_files(['c', 'h'], 'C')
 count_files(['py'], 'Python')