It's an extension of the Typo Hero changelog notes, which are an extension of my rising madness due to releasing weekly updates for over three years :P
Basically they just mean "I fixed a bunch of typos and/or grammatical errors".
I slip them in to help keep my insanity at bay and also because judging from the technical support questions I get a lot of people don't bother reading the notes so this is a way to encourage them to do so ;)