Fix spurious </think> tags caused by empty string reasoning_content in streaming (#7025)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: ekzhu <320302+ekzhu@users.noreply.github.com>
Co-authored-by: Eric Zhu <ekzhu@users.noreply.github.com>

Copilot committed 11mo ago

79d5d6ab47f289f346ebe6221a5299fd35e6d2c0

Parent: 5216bf3

Committed by GitHub <noreply@github.com> on 9/16/2025, 9:06:50 AM