diff --git a/utils/mkrest.py b/utils/mkrest.py
index 6ccff980df6..a5320ef2d01 100755
--- a/utils/mkrest.py
+++ b/utils/mkrest.py
@@ -81,10 +81,8 @@ def read_file(name):
 if tmp_data:
     sys.stdout.write(tmp_data)
 
-arguments = ['pandoc', '-s', '-r', 'html', src_file, '-w', 'rst']
-process = subprocess.Popen(
-    arguments, stdout=subprocess.PIPE
-)
+arguments = ["pandoc", "-s", "-r", "html", src_file, "-w", "rst"]
+process = subprocess.Popen(arguments, stdout=subprocess.PIPE)
 html_text = process.communicate()[0]
 if html_text:
     for k, v in replacement.iteritems():