* Minor improvements
* Expand How to Teach This
* Fix explanation of f(*,x)
* Move How to Teach This
* Remove comment about syntax highlighting
* Clarify 'one name'
* Address comments
* Highlighting other references
* Add comment about extending the AST node attributes
* Clarify logic in case of expanding syntax on mouseover
* Fix list format
* Address willingc comments
* Retain 'a very simple' for discussion
* Add 'relatively straightforward'