RFR: 8306431: The documentation of File.listRoots should be modifid after JDK-8208077 [v3]

[Nagata-Haruhito]

> I fixed File.listRoots description.
> * remove "the insertion or ejection of removable media"
> * change "available" to "existing"
> 
> Please review this change.

Nagata-Haruhito has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains two new commits since the last revision:

 - 8306431: The documentation of File.listRoots should be modifid after JDK-8208077
 - 8306431: File.listRoots method description should be re-examined

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13526/files
  - new: https://git.openjdk.org/jdk/pull/13526/files/ff1a5ce5..ef38a529

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13526&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13526&range=01-02

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13526.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13526/head:pull/13526

PR: https://git.openjdk.org/jdk/pull/13526