ci: speed up code-coverage jobs

some documentation updates

refs #3809

Change-Id: I0c837a3b8f0f5e5e15d20ba41418bf17660fffb5
diff --git a/.gitignore b/.gitignore
index 4629c34..4b87a69 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,8 @@
 .waf-1*
 .waf3-*
 .lock*
-**/*.pyc
+*.pyc
+*.pyo
 build/
 VERSION
 unit-tests.conf