Fixed flake8 errors (#72)

Signed-off-by: Alejandro Hernández Cordero <[email protected]>

point_cloud_transport/doc/conf.py

@@ -25,6 +25,8 @@
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
+from datetime import datetime
+
 import os
 import sys
 sys.path.insert(0, os.path.abspath('.'))
@@ -33,9 +35,8 @@
 # -- Project information -----------------------------------------------------
 
 
-from datetime import datetime
-now = datetime.now() # current date and time
-year = now.strftime("%Y")
+now = datetime.now()  # current date and time
+year = now.strftime('%Y')
 
 project = 'point_cloud_transport'
 copyright = '2008-' + year + ', Open Source Robotics Foundation, Inc.'  # noqa
@@ -62,7 +63,7 @@
     'sphinx.ext.doctest',
     'sphinx.ext.coverage',
     'sphinx_rtd_theme',
-    "myst_parser",
+    'myst_parser',
 ]
 
 # Add any paths that contain templates here, relative to this directory.