Sync TODO and comment processing with external repo.

Copybara transforms code slightly different than MOE. One
example is the TODO username stripping where Copybara
produces different results than MOE did. This change
moves the Copybara versions of comments to the public
repository.

Note: These changes didn't originate in cl/247950252.

PiperOrigin-RevId: 247950252

snappy-stubs-internal.h

@@ -199,7 +199,7 @@ struct Unaligned32Struct {
     ((reinterpret_cast< ::snappy::base::internal::Unaligned32Struct *>(_p))->value = \
          (_val))
 
-// TODO(user): NEON supports unaligned 64-bit loads and stores.
+// TODO: NEON supports unaligned 64-bit loads and stores.
 // See if that would be more efficient on platforms supporting it,
 // at least for copies.