maintner: shorten log message about comments

We print the entire reponse from Github when we log messages about how
many comments were found, which seems unnecessary - the most useful
bit of information is the number of comments found. Also print the
issue number we're fetching comments for.

Change-Id: I5eca0ea1e4ea737642a535b61a8dd65838b44773
Reviewed-on: https://go-review.googlesource.com/41301
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed