<regex>: Small cleanups after completion of non-recursive matcher - #5818

<regex>: Small cleanups after completion of non-recursive matcher#5818

Stephan T. Lavavej (StephanTLavavej) merged 4 commits into

microsoft:mainmicrosoft/STL:mainfrom

muellerj2:regex-post-nonrecursive-matcher-cleanupmuellerj2/STL:regex-post-nonrecursive-matcher-cleanupCopy head branch name to clipboard