multimarkdown: add test

Closes #28630.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
rakudo-star: add jvm option

Closes #28408.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
pyqt5: update to install documentation and examples
Fixed trailing whitespace
Make docs installation optional
Removed unnecessary Dir[
pyqt5: add 5.2.1 bottle.