Well, that's a creative solution, but it wouldn't be what I'm proposing. Your code adds info on how many times the last line was repeated, but it does not merge the lines. This is what your example outputs:
<clear the log>
Something got logged here
An example
An example (repeated 2 times)
An example (repeated 3 times)
An example (repeated 4 times)
An example (repeated 5 times)
An example (repeated 6 times)
An example (repeated 7 times)
An example (repeated 8 times)
An example (repeated 9 times)
An example (repeated 10 times)
Ham and cheese
And finally this line
And finally this line (repeated 2 times)
Where my suggestion would instead output this:
<clear the log>
Something got logged here
An example (repeated 10 times)
Ham and cheese
And finally this line (repeated 2 times)
Now, if we had a command with the clumsy name of
DeleteLastLogLine, we could add that to your code and get exactly the proposed behaviour. But why extend the language with something like that? It probably makes lots more sense to just update how the log window works.