RFR: 8340693: [TestBug] Format Error in USKeyboardTest

[Ziad El Midaoui]

The USKeyboardTest tests were failing with IllegalFormatArgumentIndexException at index 0, in java.util.Formatter the first argument is referred to as 1$ not 0$ .

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Commit messages:
 - Fixed USKeyboardTest Tests failing

Changes: https://git.openjdk.org/jfx/pull/1683/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1683&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340693
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx/pull/1683.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1683/head:pull/1683

PR: https://git.openjdk.org/jfx/pull/1683