First, a few bug fixes with the keyword lists and help links:

• Added a bit of code to differentiate between a normal let and a named let.
• Fixed for losing the syntax definitions on some systems.

Also, I wrote code to generate help files for the C211 libraries. Theoretically, I should just be able to update these with future updates to the APIs:

• Image API
• Matrix API
• Tree API
• Turtle API
• Color API (Edit: Added 19 May after re-factoring of colors)

As a side note, I’ve added two new functions to the tree API:

• (left-subtree? tr) - returns #t if the given tree has a non-empty left subtree
• (right-subtree? tr) - returns #t if the given tree has a non-empty right subtree