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

[Paul Kirth via cfe-commits]

================
@@ -1,12 +1,19 @@
 function genLink(Ref) {
   var Path = `${window.location.protocol}//${window.location.host}/${Ref.Path}`;
+  var isFileProtocol = window.location.protocol.startsWith("file");
+  // we treat the file paths different depending on if we're
+  // serving via a http server or viewing from a local
+  if (isFileProtocol) {
+    Path = `${window.location.protocol}//${RootPath}/${Ref.Path}`;
+  }
----------------
ilovepi wrote:

Maybe it makes sense to initialize `Path` w/ the ternary operator? Also, I'm now wondering if we really want `var` here or if this should be declared w/ `let`.  

This should improve the performance slightly, since `Path` is only initialized once, and saves at least 1 allocation on the JS heap. My JS is pretty weak though, so if I'm wrong on that, I'm happy to defer.

```suggestion
  let isFileProtocol = window.location.protocol.startsWith("file");
  // We treat the file paths different depending on if we're
  // serving via a http server or viewing from a local.
  var Path =  isFileProtocol ?  `${window.location.protocol}//${RootPath}/${Ref.Path}` :`${window.location.protocol}//${window.location.host}/${Ref.Path}`;
```


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