Pretty Good Program, But...
I recommend offering a single space after each sentence as an option. Like many others, growing up I learned to use a double space, but quickly unlearned it as my college experience taught me that this is no longer the standard. However, there doesnt seem to be an incorrect way - it is preferential. Making it an option would resolve the issue. Personally, Id rather not have to use double spacing (which took me some time to get out of the habit of) for the speed tests that I use to improve my speed, only to have it essentially ineffective because I do not use double spacing in the real world.
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