message: Consistent-ize punctuation in CONTRIBUTING.md.
diff: @@ -63,7 +63,7 @@ difficulty labels:
  * Beginner - Suitable for people new to Criterion.rs, or even new to Rust in general
  * Intermediate - More challenging, likely involves some non-trivial design decisions and/or knowledge
  of Criterion.<span></span>rs' internals
  -* Bigger Project - Large and/or complex project such as designing a complex new feature.
  +* Bigger Project - Large and/or complex project such as designing a complex new feature
  Additionally, there are a few other noteworthy labels:
  