RFR: Cleanup contractions [v2]

[Jesper Wilhelmsson]

> An attempt to unify the language in the guide with regards to contractions. There was a (very brief) discussion on this on the mailing list: https://mail.openjdk.java.net/pipermail/guide-dev/2020-December/000444.html
> 
> is not --> isn't
> do not --> don't
> are not --> aren't
> etc

Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:

  Updated description of trivial

-------------

Changes:
  - all: https://git.openjdk.java.net/guide/pull/42/files
  - new: https://git.openjdk.java.net/guide/pull/42/files/30f17fbb..5fca26f7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=guide&pr=42&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=guide&pr=42&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/guide/pull/42.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/42/head:pull/42

PR: https://git.openjdk.java.net/guide/pull/42