FMSLogo Code

Initialize the pens on GNU/Linux.
This is now supported by the code base and, without it, the turtles don't draw until you set their pen color.

Increase the amount of time BYETEST.PENDINGEVENTS waits for the child Logo instance to show a dialog box.
During the previous two test passes, the test reported that it couldn't find the dialog, so this is an attempt to make the test more robust.

Cleanup: Remove some unused member functions of qlist

Update FMSLogo to use wxPen instead of HPEN
This enables setting pen colors on GNU/Linux.
This required an additional patch to wxWidgets 3.1.3, but a similar fix has already been applied to 3.1.4.
This change may have slightly altered the images that get drawn, as a few of the drawing tests failed due to differences in the drawn image in ways that I was unable to see.

Fix indentation in a switch statement to be consistent

Refactoring: Replace ndprinf() with a simpler print_string()
This is easier to read (no confusion over "%t" or why the flag to print backslashes is ignored.

Fix a regression in expand_slash that was added when update FMSLogo to use Unicode.
A misplaced "*" made it over-allocate the size of the string.

Add some comments to explain what expand_slash does.
Also give "i" a better name, since it isn't an index.

Cleanup: Remove unneeded checks from real_print_helper and add comments

Add some comments related to the NT_VBAR flag.