[clang-tools-extra] [clang-doc] switched from using relative to absolute paths (PR #93281)

[Paul Kirth via cfe-commits]

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@@ -0,0 +1,7 @@
+// RUN: rm -rf %t
+// RUN: mkdir %t
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ilovepi wrote:

nit: Can be one line w/ `&&`

https://github.com/llvm/llvm-project/pull/93281