Text with colon incorrectly reconglised as a link

Steps to reproduce:
1. Type 'mvn exec:java'
Interim result: all plain text
2. Select just typed text, hit Ctrl+C (or Ctrl+X), then Ctrl+V
Result: "exec:java" became a link
Expected result: text pasted exactly as it was copied.

(just deleted a long runt here about this function being called copy for the reason - it is increasingly tough to stay polite reporting countless bugs in the new Editor)