RFR: JDK-8315921: Invalid CSS declarations in java.lang class documentation [v2]

[Hannes Wallnöfer]

> This change fixes two errors in inline HTML styles in the `java.lang` package: 
> 
>  - wrong CSS property name in `java.lang.String` 
>  - CSS declaration terminated by colon instead of semicolon in `java.lang.Thread`
> 
> Both errors caused the style declarations to be ignored and an error message to be shown in the browser console. 
> 
> The bug is `noreg-doc`, I tested the docs in the browser to make sure the error message is gone and the HTML displays as intended.

Hannes Wallnöfer has updated the pull request incrementally with one additional commit since the last revision:

  Find and fix more invalid CSS declarations

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15762/files
  - new: https://git.openjdk.org/jdk/pull/15762/files/cf60279a..29b2065f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15762&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15762&range=00-01

  Stats: 40 lines in 4 files changed: 0 ins; 0 del; 40 mod
  Patch: https://git.openjdk.org/jdk/pull/15762.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15762/head:pull/15762

PR: https://git.openjdk.org/jdk/pull/15762