Merge another codecov

codecov.yml

@@ -1,18 +1,21 @@
-# Hold ourselves to a high bar
+# ref: https://docs.codecov.com/docs/codecovyml-reference
 coverage:
+  # Hold ourselves to a high bar
   range: 85..100
   round: down
   precision: 1
   status:
+    # ref: https://docs.codecov.com/docs/commit-status
     project:
       default:
+        # Avoid false negatives
         threshold: 1%
 
 # Test files aren't important for coverage
 ignore:
   - "tests"
 
-# Make less noisy comments
+# Make comments less noisy
 comment:
   layout: "files"
   require_changes: yes