[flang-commits] [clang] [flang] Fix more diagnostic wording for style; NFC (PR #93190)

[Vlad Serebrennikov via flang-commits]

================
@@ -10362,12 +10362,12 @@ def err_shufflevector_argument_too_large : Error<
   "index for __builtin_shufflevector must be less than the total number "
   "of vector elements">;
 def err_shufflevector_minus_one_is_undefined_behavior_constexpr : Error<
-  "index for __builtin_shufflevector not within the bounds of the input vectors; index of -1 found at position %0 not permitted in a constexpr context.">;
+  "index for __builtin_shufflevector not within the bounds of the input vectors; index of -1 found at position %0 not permitted in a constexpr context">;
----------------
Endilll wrote:

```suggestion
  "index for __builtin_shufflevector not within the bounds of the input vectors; index of -1 found at position %0 is not permitted in a constexpr context">;
```

https://github.com/llvm/llvm-project/pull/93190