[com.google.fonts/check/license/OFL_body_text] is very strict on formatting

[RosaWagner]

(NOTE: Please include the check-id in the issue's title. Check-id example: [com.google.fonts/check/metadata/parses])

Observed behaviour

🔥 FAIL: Check OFL body text is correct. (com.google.fonts/check/license/OFL_body_text)
🔥 FAIL The OFL.txt body text is incorrect. Please use https://github.com/googlefonts/Unified-Font-Repository/blob/main/OFL.txt as a template. You should only modify the first line. [code: incorrect-ofl-body-text]

Have this FAIL but the difference between the OFL template we use and the one reported by the FAIL are ignorable:

Expected behaviour

We want to make sure that the OFL license content has not been modified, but formatting such as that is okay, and doesn't worth a new PR upstream to change their license. I remember we introduced this check because Dave was attached to the formatting of the header to follow exactly this (one empty line and then 2 empty lines):

Copyright 20** The My Font Project Authors (https://github.com/googlefonts/googlefonts-project-template)

This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
https://scripts.sil.org/OFL


-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------

But it also create FAILS we would ignore cause this missing space at the end of the line doesn't worth to be fixed upstream, and then repackage.

Resources and steps needed to reproduce

Found in google/fonts#6799 (comment)

cc @davelab6

[felipesanches]

OK. I can try to improve the check to ignore differences if they only differ in space chars.