Explain normalization in auth test. (#46)

tests/testthat/test-req_auth_api_key.R

@@ -36,16 +36,17 @@ test_that("req_auth_api_key works for query", {
     api_key = "my_key",
     location = "query"
   )
-  # As of 2025-01-20, httr2 on macos did not insert the "/", but all other OSs
-  # did. Normalizing manually here.
+  # In httr2 <=1.0.7, path can be NULL. in 1.1.0+, path is normalized to at
+  # least "/". Normalize to make sure this test passes in both of those
+  # versions.
   test_result$url <- stringr::str_replace(
     test_result$url,
-    stringr::fixed("/?parm"),
-    stringr::fixed("?parm")
+    stringr::fixed("example.com?parm"),
+    stringr::fixed("example.com/?parm")
   )
   expect_identical(
     test_result$url,
-    "https://example.com?parm=my_key"
+    "https://example.com/?parm=my_key"
   )
 })