Enclose the text in braces. In this case, the rule is to choose the more pleasing format.
Most computer languages are case sensitive.
In C, for example, Printf is different from the identifier printf , and most likely is a misspelling of it. Even in languages which are not case sensitive, it is confusing to a human reader to see identifiers spelled in different ways. Pick one spelling and always use that. If you do not want to start a sentence with a command written all in lower case, you should rearrange the sentence. In the Info file, it causes the Info formatting commands to use single quotation marks around the text.