RFR: 8336792: DateTimeFormatterBuilder append zeros based on StringBuilder.repeat

[Chen Liang]

On Thu, 18 Jul 2024 23:36:37 GMT, Shaojin Wen <duke at openjdk.org> wrote:

> The StringBuilder.repeat method was added in JDK 21, which can be used to make some minor optimizations to existing code, including DateTimeFormatterBuilder

Looks good and simple.

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

Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20245#pullrequestreview-2187172092