I, and others, have experienced problems with wide text files. Automatic HTML writers have been my bane. "-w 32000" isn't always adequate. "-u <something>" would work, except normal text lines joined on the same display line are really hard to read.
The suggestion: a combination of -u and -w such that lines shorter than "-uw" would show just that line, and lines longer than "-uw" would start a new display at the "-uw" width. To see where lines actually end, I would expect to see the line end character(s). Inserting or deleting characters might cause affected lines to wrap or unwrap, based on their new lengths.
ex: -uw 23
short line 1\ this is a really long l
ine that ends at this f
ull stop.\ short line 3\ which is followed by nu
ll line\ \ then line of 6 spaces\ \ and so on\
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