Congjian Wang - INL

@PaulTalbot-INL Could you address this issue in the next couple of weeks?

@PaulTalbot-INL Could you send an email to the users regarding this fix?

@PaulTalbot-INL @dylanjm Do you have time to look into this issue?

checklist passed.

@huang714 Could you resolve the conflicting files in this PR?

There is a trailing space issue, could you fix it? @huang714 

@huang714 white space issue, could you resolve it? 

@huang714 Can you resolve the conflict? The postprocessor.tex has been updated recently.

Hi @huang714, fyi, the following test failed on most of the Linux machines: FAILED: Diff tests/framework/PostProcessors/Validation/test_validation_gate_pcm 

checklist is good, and tests passed.