[valhalla-docs] RFR: Minor grammatical fixes [v2]

[Dan Heidinga]

> Some minor grammatical changes and a adjusted wording to reflect that Q may be flattened but flatness isn't guaranteed.

Dan Heidinga has updated the pull request incrementally with one additional commit since the last revision:

  Add missing array '[' to descriptor

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Changes:
  - all: https://git.openjdk.java.net/valhalla-docs/pull/8/files
  - new: https://git.openjdk.java.net/valhalla-docs/pull/8/files/2df9b8b1..f880d6b0

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla-docs&pr=8&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla-docs&pr=8&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/valhalla-docs/pull/8.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla-docs pull/8/head:pull/8

PR: https://git.openjdk.java.net/valhalla-docs/pull/8