[munificent]

> Well, one could write one sentence per one line, but that makes a pretty ugly txt document, when viewed raw.

Many of the tech writers I work with advocate exactly this.

In my stuff, I just hard line wrap the text. Diffs do tend to have more spurious whitespace changes because of this than I'd like, but that's still miles better than a completely opaque binary format like Word.

[tomsthumb]

Not to advocate for word or anything, but technically it's a zip of xml and other stuff (images, etc) that get's pulled in through ... OLE(??). VC + markdown/latex excellent for collaboration or branching drafts.