Rename LeadingExpansion and TrailingExpansion to LeftExpansion and RightExpansion
Created attachment 406073 [details] Patch
Created attachment 406076 [details] Patch
Created attachment 406077 [details] Patch for committing
Committed r265338: <https://trac.webkit.org/changeset/265338> All reviewed patches have been landed. Closing bug and clearing flags on attachment 406077 [details].
<rdar://problem/66635560>