Fix invalid f-string (#375)

diff --git a/httpx/config.py b/httpx/config.py
index 07b0a73959461834781aacdccbbb8f33a01e7a0a..442fd98bd06c3d8fd04c8c700a43083ec8078abd 100644 (file)
--- a/httpx/config.py
+++ b/httpx/config.py
@@ -269,8 +269,8 @@ class HTTPVersionConfig:
             }
         else:
             raise TypeError(
-                f"HTTP version should be a string or list of strings, "
-                "but got {type(http_versions)}"
+                "HTTP version should be a string or list of strings, "
+                f"but got {type(http_versions)}"
             )
 
         for version in self.http_versions:
@@ -278,7 +278,7 @@ class HTTPVersionConfig:
                 raise ValueError(f"Unsupported HTTP version {version!r}.")
 
         if not self.http_versions:
-            raise ValueError(f"HTTP versions cannot be an empty list.")
+            raise ValueError("HTTP versions cannot be an empty list.")
 
     @property
     def alpn_identifiers(self) -> typing.List[str]: