The attached patch makes the following changes:
1) Add a description of the jardir and tstjardir convenience variables.
2) Add a closing double quote in the set CLASSPATH statement.
3) Simplify the suggested CLASSPATH by removing jar files that will be pulled in automatically by derbyrun.jar.
I didn't change "set" to "export" as I expect that to differ from shell to shell. (I have no idea which shell uses "set" instead of "export" or "setenv", but I guess it's good enough as an example.)
Committed revision 1102688.