[NFC] fix description spelling problems

Author: mdtoguchi

clang/include/clang/Basic/LangOptions.def

@@ -254,7 +254,7 @@ LANGOPT(SYCLExplicitSIMD  , 1, 0, "SYCL compilation with explicit SIMD extension
 LANGOPT(EnableDAEInSpirKernels , 1, 0, "Enable Dead Argument Elimination in SPIR kernels")
 LANGOPT(
     SYCLValueFitInMaxInt, 1, 1,
-    "SYCL compiler assume value fits within MAX_INT for member function of "
+    "SYCL compiler assumes value fits within MAX_INT for member function of "
     "get/operator[], get_id/operator[] and get_global_id/get_global_linear_id "
     "in SYCL class id, iterm and nd_iterm")