The word "generally" here has a precise meaning when used in a formal (mathematical) sense. Using that meaning, the phrase "wrapped code is generally nonsensic

The word "generally" here has a precise meaning when used in a formal (mathematical) sense. Using that meaning, the phrase "wrapped code is generally nonsensical" could be read as "there exists some code that is nonsensical when line-wrapped" or "the amount of code that is nonsensical when line-wrapped is non-zero". More precisely, it means that, in general, you cannot rely on any ol' code to remain sensical after wrapping has taken place. Hopefully, it's obvious that this is true.