Version: 5.4 RC2
Settings of UDL:
Ignore case: YES
Treat keywords as symbol: YES (I dont' think it has affect)
Comment Open: "start_x start_y"
Comment Close: "end_x end_y"
I can't make it to close comment with second key word "end_y". Start comment worked just fine.
It selects text with custom colors. But only first Comment Close worked. Not second one.
Status of test:
start_x > end_x OK -> This should work
start_y > end_x OK -> This shouldn't work
start_x > end_y ERROR -> This shouldn't work
start_y > end_y ERROR -> This should work