never advance seek position in `std.Io.Reader.peekDelimiterExclusive` (#24899)
* extend std.Io.Reader.peekDelimiterExclusive test to repeat successful end-of-stream path (fails)
* fix std.Io.Reader.peekDelimiterExclusive to not advance seek position in successful end-of-stream path
81f5a7b8fdRohlem committed on 8/19/2025, 6:19:02 PM· committed by GitHubparent07e7cfa