Make link detection instant on substring termination

If a link is typed or pasted and you add a space or newline and keep typing, the link detection will not activate until sometime after you stop typing.

### What
It should automatically detect a link when that substring is terminated.

### Why
It looks like the function is broken or not present otherwise.

### How
N/A

No source file, test, or entry point is named. First reproduce the issue in the Android app by typing or pasting a link, terminating it with a space or newline, and continuing to type. Done means link detection activates immediately when the substring is terminated rather than after typing stops.

Written by the indexing model from the issue text.