default to plaintext errors

CHANGELOG.md

@@ -13,10 +13,14 @@ Bocadillo adheres to [Semantic Versioning](https://semver.org).
 - Show Bocadillo version using `boca -v/-V/--version/version`.
 - Built-in `HTTPError` handlers: `error_to_html`, `error_to_media`, `error_to_text`.
 
+### Changed
+
+- Exceptions raised in middleware callbacks were always handled by the HTML `HTTPError` handler. If configured, the one on the `API` will now be used instead.
+- The default `HTTPError` handler now returns plaintext instead of HTML.
+
 ### Fixed
 
 - Serving static files from a non-existing directory (including the default one) used to raise an invasive warning. It has been silenced.
-- Exceptions raised in middleware callbacks were always handled by the HTML `HTTPError` handler. If configured, the one on the `API` will now be used instead.
 
 ### Removed
 

bocadillo/error_handlers.py

@@ -44,7 +44,7 @@ def convert_exception_to_response(
 ):
     """Wrap call to `dispatch()` to always return an HTTP response."""
     if error_handler is None:
-        error_handler = error_to_html
+        error_handler = error_to_text
 
     @wraps(dispatch)
     async def inner(req: Request) -> Response: