docs(dictionary): add missing pycor and correct modes example result

[alan-isaac]

In the NetLogo Dictionary, pycor is not listed among the patch variables.

This is an extremely minor issue, but I did not know how else to report it. Apologies if this is the wrong place.

[ERSUCC]

Hi Alan,

Thank you for the report, we'll resolve this soon! This is a good place to report issues with the documentation, so no worries about that.

Isaac B.

[alan-isaac]

OK thanks. Since the following is also minor and this issue is still open, I'll attempt to bundle it. The third example for modes has a problem: the wrong result is shown.