RFR: 8340229: Improve opening sentence of FileInputStream constructor specification [v3]

[Brian Burkhalter]

> Improve the first sentences of the three `FileInputStream` constructors, in particular removing the term "connection."

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

  8340229: Correct typo in FIS

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21223/files
  - new: https://git.openjdk.org/jdk/pull/21223/files/d345bce5..c03751d7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21223&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21223&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21223.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21223/head:pull/21223

PR: https://git.openjdk.org/jdk/pull/21223