Code monitors sending large amounts of error messages in at least one case

Created by: benvenker

From @rrhyne:

I have a code monitor set up for this query: repo:^github\.com/sourcegraph/sourcegraph$ file:^CHANGELOG\.md type:diff select:commit.diff.added ## \d.\d\d\. While I was out on vacation I received 100s of emails related to it, all leading to a no results page. Two points of feedback: I'm sure it used to return a result and removing the commit search seems to make it work again Getting 100s of emails just made me want to turn it off and I'm not sure why that would occur based on the results of the query. Also, there is probably a better option for when that many matches does occur, though I'm not sure what I'd recommend right now.