@nick many thanks for your work and also the detailed tutorial 
I deviated a little from your solution because Textexpander has the default setting "Formatted text…) for me. Also, it bothers me that the TE display window is not centered on the desktop.
But thanks to Keyboard Maestro all this is no problem. So I don’t use the “key combo”, but the “url” solution.
After the TE window appears centered, the “Formatted Text…” setting is also changed to “Plain Text”.
