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

[Sergey Bylokhov]

On Tue, 1 Aug 2023 12:36:21 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> We may… I didn't scan the entire code base, I was reading the code of `JFormattedTextField` found the typo and decided to correct it. It's part of the Java SE API.
>
> The word _‘it self’_ is present in HTML files in SwingSet2 and SwingSet3 in the excerpts from [**Micrographia**](https://en.wikipedia.org/wiki/Micrographia). I'd rather not touch it, these are meant to be the exact text of the book, there are many misspellings or archaic spellings in the files.

we have similar typo in the BasicTreeUI.java as well.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/15087#discussion_r1281162502