Merge pull request #491 from lazarusA/code_copy

activates code copy button

Author: lazarusA

docs/mkdocs.yml

@@ -2,8 +2,9 @@ theme:
   name: material
   #logo: assets/icons8-green-earth-48.png
   features:
+    - content.code.copy
     # - announce.dismiss
-    #- content.code.annotate
+    - content.code.annotate
     # - content.tabs.link
     #- content.tooltips
     # - header.autohide