<format>: Fix handling of replacement field when format-spec is absent - #4640

<format>: Fix handling of replacement field when format-spec is absent#4640

Stephan T. Lavavej (StephanTLavavej) merged 5 commits into

microsoft:mainmicrosoft/STL:mainfrom

frederick-vs-ja:fix-replacement-fieldfrederick-vs-ja/STL:fix-replacement-fieldCopy head branch name to clipboard