[PATCH] D90386: [ADT] Add methods to SmallString for efficient concatenation

[Nathan James via Phabricator via llvm-commits]

njames93 added a comment.

In D90386#2363594 <https://reviews.llvm.org/D90386#2363594>, @dblaikie wrote:

> Looks good -please add a test for the assign function this patch adds too.

There already is an assign test, should probably improve the append test so the string isn't empty before hand


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https://reviews.llvm.org/D90386