capitalization - Should I change the structure of a sentence/add filler words to make sure that the sentence always starts with a capital letter?

Here is a quote from a book on C++ ("for", "while" and "do" are keywords in many languages, and in most languages they have to be in lower case. The C++ language is one of those.):

Simply put, algorithm names suggest what they do. "for", "while", and "do" don't.

One cannot write "For" instead of "for", because that would no longer refer to a well-known technical term, but to something else. Some attempts to fix this sentence would be:

The "for", "while", and "do" don't.

or:

The keywords "for", "while", and "do" don't.

or:

Use of "for", "while", or "do" does not.

Is this a good practice? Is this even an issue? What about other examples, such as starting sentence with a number, with a lower case letter in English or a foreign language, such as:

"l" looks a bit like "i".
as opposed to something like:
letter "l" looks a bit like "i".