Docs: fix rendering clan source code url

lib/docs.nix

@@ -1,21 +1,25 @@
 { lib, ... }:
-{
+rec {
+  prefix = "https://git.clan.lol/clan/clan-core/src/branch/main/";
   # Strip store paths from option declarations to make docs more stable
   # This prevents documentation from rebuilding when store paths change
   # but the actual content remains the same
-  stripStorePathsFromDeclarations = opt:
-    opt // {
-      declarations = map (decl:
+  stripStorePathsFromDeclarations =
+    opt:
+    opt
+    // {
+      declarations = map (
+        decl:
         if lib.isString decl && lib.hasPrefix "/nix/store/" decl then
           let
             parts = lib.splitString "/" decl;
           in
-            if builtins.length parts > 4 then
-              "/" + lib.concatStringsSep "/" (lib.drop 4 parts)
-            else
-              decl
+          if builtins.length parts > 4 then
+            (prefix + "/" + lib.concatStringsSep "/" (lib.drop 4 parts))
+          else
+            decl
         else
           decl
       ) opt.declarations;
     };
-}
+}