RFR: 8313348: Fix typo in JFormattedTextField: 'it self'

[Prasanta Sadhukhan]

On Mon, 31 Jul 2023 10:14:45 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> A trivial change: ‘it self’ → ‘itself’.
> 
> In addition to it, I added a comma after ‘Similarly’ where it starts a sentence.

Marked as reviewed by psadhukhan (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/15087#pullrequestreview-1560174243