Update README.md (#13)

docs: correct handler variable name in README file.

Author: suli-g

README.md

@@ -65,7 +65,7 @@ import sys
 logger = logging.getLogger(__name__)
 message_handler = logging.StreamHandler(sys.stdout)
 message_handler.setFormatter(MessageFormatter())
-logger.addHandler(handler)
+logger.addHandler(message_handler)
 
 values_handler = logging.StreamHandler(sys.stderr)
 values_handler.setFormatter(ValuesFormatter())
@@ -230,4 +230,4 @@ element = html(t'<{Magic} id="wow"><b>FUN!</b></{Magic}>')
 assert str(element) == '<div id="wow" data-magic="yes"><b>FUN!</b>Magic!</div>'
 ```
 
-The `html()` template processing code sees that `{Magic}` is an interpolation, that it occurs in the tag position, and that its value is a `Callable`. As a result, `html()` calls `Magic()` with the interpolated children and attributes and uses the result returned _by_ `Magic()` as the final `Element`.
+The `html()` template processing code sees that `{Magic}` is an interpolation, that it occurs in the tag position, and that its value is a `Callable`. As a result, `html()` calls `Magic()` with the interpolated children and attributes and uses the result returned _by_ `Magic()` as the final `Element`.