spelling: that

Signed-off-by: Josh Soref <[email protected]>

Author: jsoref

test/TBD/specialization.swift

@@ -1,5 +1,5 @@
 // REQUIRES: VENDOR=apple 
-// Validate the the specializations actually exist (if they don't then we're not
+// Validate that the specializations actually exist (if they don't then we're not
 // validating that they end up with the correct linkages):
 // RUN: %target-swift-frontend -emit-sil -o- -O -Xllvm -sil-disable-pass=cmo -validate-tbd-against-ir=none %s | %FileCheck %s