Basic grammatical corrections to 'page/learn/understand/api.html'
Basic grammatical corrections to 'page/learn/understand/api.html'

Some typing and spelling errors fixed, and some grammatical and
editorial corrections made. Original content and intent of the author
were preserved.

atk4/atk4-web,atk4/atk4-web,atk4/atk4-web,atk4/atk4-web,atk4/atk4-web