Remove extra end of line in one line templates

Summary:
We should move this part of the code to a template system
but meanwhile, this last replace ensures one line mode
doesn't get extraneous EOL.

Test Plan: https://www.wired.com/2017/05/crazy-eruptions-spit-diamonds/

Reviewers: Thibaut120094

Reviewed By: Thibaut120094

Differential Revision: https://devcentral.nasqueron.org/D985