[5.5] [Refactoring] Preserve comments in async transform #37404
Merged
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5.5 cherry-pick of #37387
Previously we would drop comments between nodes in a BraceStmt, as we printed each node out individually. To remedy this, always make sure we scan backwards to find any preceding comments attached to a node. In addition, make sure we keep track of any SourceLocs which we don't print, but may have comments attached which we want to preserve.
rdar://77401810