RFR: 4847239: (spec) File.createTempFile() should make it clear that it doesn't create the temporary directory [v2]

[Brian Burkhalter]

> Augment the specification of `java.io.File.createTempFile(String,String,File)` to clarify its behavior with respect to the `File` parameter `directory`.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  4847239: Add test

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4561/files
  - new: https://git.openjdk.java.net/jdk/pull/4561/files/cd931a77..453600c1

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4561&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4561&range=00-01

  Stats: 106 lines in 1 file changed: 106 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4561.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4561/head:pull/4561

PR: https://git.openjdk.java.net/jdk/pull/4561