Merge pull request #13082 from glessard/patch-1

diff --git a/stdlib/public/core/UnsafePointer.swift.gyb b/stdlib/public/core/UnsafePointer.swift.gyb
index f437211..01e308e 100644
--- a/stdlib/public/core/UnsafePointer.swift.gyb
+++ b/stdlib/public/core/UnsafePointer.swift.gyb
@@ -819,7 +819,7 @@
 %  if mutable:
   /// For a pointer `p`, the memory at `p + i` must be initialized when reading
   /// the value by using the subscript. When the subscript is used as the left
-  /// side of an assignment, the memory at `p + i` must be uninitialized or
+  /// side of an assignment, the memory at `p + i` must be initialized or
   /// the pointer's `Pointee` type must be a trivial type.
   ///
   /// Do not assign an instance of a nontrivial type through the subscript to