RFR: 8337274: Remove repeated 'the' in StyleSheet.create{Small,Large}AttributeSet

[Alexey Ivanov]

A trivial fix which removes the repeated word ‘the’ from the parameter description for `StyleSheet.create{Small,Large}AttributeSet` methods. These methods are public API.

Additionally, I dropped repeated ‘then’ from the description of a private method.

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Commit messages:
 - 8337274: Remove repeated 'the' in StyleSheet.create{Small,Large}AttributeSet

Changes: https://git.openjdk.org/jdk/pull/20352/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20352&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337274
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/20352.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20352/head:pull/20352

PR: https://git.openjdk.org/jdk/pull/20352