message: [Checklist] Clarify Mnnnn or Snnnn are unique
  Per discussion with and others, "nnnn" alone will not be unique but "Mnnnn" or "Snnnn" will be unique.
  Also formats that paragraph with one sentence per line for readability.
diff: @@ -65,7 +65,9 @@ OR
  - [ ] **Snnnn**: checklist text here.
  -Where "M" stands for '*MUST*' or '*MUST NOT*' requirement. "S" stands for '*SHOULD*' or '*SHOULD NOT*' requirement. And, "nnnn" is replaced by a number that is unique among all the requirements in the checklist, thereby "nnnn" becomes a unique requirement identifier.
  +"M" stands for a '*MUST*' or '*MUST NOT*' requirement.
  +"S" stands for a '*SHOULD*' or '*SHOULD NOT*' requirement.
  +"nnnn" is replaced by a number that is unique among all of the "M" or "S" requirements in the checklist, thereby "Mnnnn" or "Snnnn" becomes a unique requirement identifier.
  ## Validation Tools for Swagger Checklist ##
  