fixup! gh-127305: more detailed doc for register_error's error_handler

Author: litlighilit

Doc/library/codecs.rst

@@ -464,7 +464,7 @@ handler:
    them into the output buffer. If the replacement is a string, the encoder will
    encode the replacement with the ``'strict'`` error handling, which means
    :exc:`UnicodeEncodeError` may be raised here.
-   Encoding continues on originalinput at the specified position.
+   Encoding continues on original input at the specified position.
    Negative position values will be treated as being
    relative to the end of the input string. If the resulting position is out of
    bound an :exc:`IndexError` will be raised.