RFR: 8276338: Minor improve of wording for String.to(Lower|Upper)Case [v2]

[Pavel Rappo]

> This PR fixes two sentences which conflate a string with its length, and also makes the "equivalency wording" consistent.
> 
> There are many ways to fix "the resulting String may be a different length than the original String". The proposed way might be one of the most lightweight ways to do that.

Pavel Rappo has updated the pull request incrementally with one additional commit since the last revision:

  Fix inconsistent formatting
  
   - Removes stray whitespace character *inside* a sentence.
   - Makes sentences that introduce tables more similar.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6232/files
  - new: https://git.openjdk.java.net/jdk/pull/6232/files/897ac5bb..625ae1aa

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6232&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6232&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6232.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6232/head:pull/6232

PR: https://git.openjdk.java.net/jdk/pull/6232