v1.9.5 improves the code editor and adds new music:
- Added one new music track
- Added block comment/uncomment
- Added block indent/unindent
- Added auto-indenting
- Added optional support for inserting tabs
- Added in-code/persistent breakpoints (prepend "!")
- Added Errata section to manual
- Fixed scrolling when starting/stopping debugging
- Fixed "program too large" error message
- Fixed small bugs in the "Multiplication" and "Mode" tasks
- Updated charts
