[clang] [libTooling] Fix `getFileRangeForEdit` for inner nested template types (PR #87673)

[Yitzhak Mandelbaum via cfe-commits]

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@@ -510,6 +519,26 @@ int c = M3(3);
   Visitor.runOver(Code.code());
 }
 
+TEST(SourceCodeTest, InnerNestedTemplate) {
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ymand wrote:

Add a test case that covers the case of the split being in the BeginToken?

https://github.com/llvm/llvm-project/pull/87673