fix typo in comment

Created using spr 1.3.8-beta.1

Author: arichardson

llvm/test/Transforms/InstSimplify/ConstProp/inttoptr-gep-nonintegral.ll

@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
 ; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
-;; Check that we do not create new inttoptr intstructions for unstable pointers
+;; Check that we do not create new inttoptr instructions for unstable pointers
 ;; or pointers with external state (even if the values are all constants).
 ;; NOTE: for all but the zero address space, the GEP should only modify the low 8 bits of the pointer.
 target datalayout = "p:16:16:16:16-p1:16:16:16:8-pu2:16:16:16:8-pe3:16:16:16:8"