RFR: 8344367: Fix mistakes in FX API docs [v2]

[Nir Lisker]

> A batch of typo and grammar fixes that were found by the spellchecker.
> 
> Integration can wait until RDP 1/2.

Nir Lisker has updated the pull request incrementally with one additional commit since the last revision:

  Addressed review comment

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1642/files
  - new: https://git.openjdk.org/jfx/pull/1642/files/403bcfae..60d4ba92

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1642&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1642&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx/pull/1642.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1642/head:pull/1642

PR: https://git.openjdk.org/jfx/pull/1642