Closes #18450: fix more typos (noticed by Févry Thibault).
Closes #18450: fix more typos (noticed by Févry Thibault).

jeff5/jython-devguide,jeff5/jython-devguide,jeff5/jython-devguide,ezio-melotti/devguide,jython/devguide,jython/devguide,jython/devguide