RFR: 8290047: (fs) FileSystem.getPathMatcher needlessly checks syntaxAndInput.length

[Brian Burkhalter]

For a `String` “s”, `s.indexOf(int)` can never return a value `>= s.length()` so change the check

        int pos = syntaxAndInput.indexOf(':');
        if (pos <= 0 || pos == syntaxAndInput.length())

to

        if (pos <= 0)

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

Commit messages:
 - 8290047: (fs) FileSystem.getPathMatcher needlessly checks syntaxAndInput.length

Changes: https://git.openjdk.org/jdk/pull/9595/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9595&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290047
  Stats: 5 lines in 4 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/9595.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9595/head:pull/9595

PR: https://git.openjdk.org/jdk/pull/9595