Add custom exclude list

Author: RSTZZZ

_config.yml

@@ -39,14 +39,18 @@ include:
 # Exclude from processing.
 # The following items will not be processed, by default. Create a custom list
 # to override the default setting.
-# exclude:
-#   - Gemfile
-#   - Gemfile.lock
-#   - node_modules
-#   - vendor/bundle/
-#   - vendor/cache/
-#   - vendor/gems/
-#   - vendor/ruby/
+exclude:
+  - Gemfile
+  - Gemfile.lock
+  - node_modules
+  - vendor/bundle/
+  - vendor/cache/
+  - vendor/gems/
+  - vendor/ruby/
+  - documentation
+  - records
+  - src
+  - tests
 
 # Plugins (previously gems:)
 plugins: