[BUG] Reddit bot talks with other bots

[thepro-3418]

Description

What went wrong?
It talked with SneakPeakbot when SneakPeakBot showed a preview of r/ExpectedTermial, calculating one of the post's factorial

Expected Behaviour

What should have happened?
It should not respond to other bots on reddit. It is nearly useless

Examples

Put link(s) to bugged comment(s) here (your comment if the bot wrongly didn't reply)
https://www.reddit.com/r/mathmemes/comments/1ubv4zy/comment/osznlhm/

[tolik518]

Hey, thank you for opening up the issue. This isn't a bug though, the bot just replies to every comment (in selected subreddits) which happen to have factorials.

We don't filter out bots (also it wouldn't be possible to filter out all bots as anyone can create bots)