hero docs, added include and parentheses info

docs/hero_mdbook_fullvm.md

@@ -11,6 +11,7 @@
 - [Troubleshooting](#troubleshooting)
   - [Fix the error: "cli execution error: Cannot pull repo..."](#fix-the-error-cli-execution-error-cannot-pull-repo)
   - [Fix: Git hangs at "Cloning into..."](#fix-git-hangs-at-cloning-into)
+- [Distinctions between mdbook and hero mdbook](#distinctions-between-mdbook-and-hero-mdbook)
 
 ***
 
@@ -154,3 +155,13 @@ If it happens another time, you can try to download it manually:
 mkdir -p /root/code/git.ourworld.tf/tfgrid && cd $_
 git clone https://git.ourworld.tf/tfgrid/info_tfgrid
 ```
+
+## Distinctions between mdbook and hero mdbook
+
+There are some distinctions between mdbook and hero mdbook. This is subject to change since hero is being continually improved and developed.
+
+- hero mdbook cannot use parenthesis in tables of contents (e.g. in SUMMARY.md)
+- hero mdbook uses the following include template:
+    ```
+    !!wiki.include page:'collection_name:file_name.md'
+    ```