RFR: StructuredTaskScope Javadoc: consistently use the phrase "contained in the task scope" [v2]

[Anthony Vanelverdinghe]

> The class-level Javadoc of StructuredTaskScope contains the following:
> 
>> The phrase "threads contained in the task scope" in method descriptions means threads started in the task scope or descendant scopes.
> 
> However, the method-level Javadoc sometimes uses slightly different wordings.
> This PR updates the Javadoc to consistently use the phrase "contained in the task scope" (and fixes an unrelated typo).
> 
> PS: I'll need help from someone to create a JBS issue & sponsor this PR

Anthony Vanelverdinghe has updated the pull request incrementally with one additional commit since the last revision:

  Revert incorrect change

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

Changes:
  - all: https://git.openjdk.org/loom/pull/194/files
  - new: https://git.openjdk.org/loom/pull/194/files/a932fcfd..2c826726

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=loom&pr=194&range=01
 - incr: https://webrevs.openjdk.org/?repo=loom&pr=194&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/loom/pull/194.diff
  Fetch: git fetch https://git.openjdk.org/loom pull/194/head:pull/194

PR: https://git.openjdk.org/loom/pull/194