Fix two word spellings

Change-Id: I7e641ec6419607b7b473b5fdc4a4e9a4a9203a0d

os_doc_tools/commands.py

@@ -607,7 +607,7 @@ def get_clients():
 
 
 def document_single_project(os_command, output_dir):
-    """Create documenation for os_command."""
+    """Create documentation for os_command."""
 
     clients = get_clients()
 

tox.ini

@@ -15,7 +15,7 @@ commands =
     flake8
     # Run doc8 to check .rst and .txt files.
     # HACKING.rst is the only file that is not referenced from
-    # doc/source, so add it explicitely.
+    # doc/source, so add it explicitly.
     doc8 -e txt -e rst doc/source/ HACKING.rst
     # Run bashate during pep8 runs to ensure violations are caught by
     # the check and gate queues.