Improvements to the tutorial

Arjen Markus (18 october 2018) This page documents various improvements to the tutorial to give credit to the people who reported the flaws.

Glenn Jackman: wrong use of the variable command in Tcl lesson OOP1

Julian Noble: incorrect note on the \x substitution -- the \x substitution does use at most two digits

Michael: no description of the "fall-through" option in the lesson on the switch command