[rfc] dumb terminal, progress bar and 'read knit index: ..'

[Alexander Belchenko]

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$ bzr diff >1.diff 2>stderr
$ cat stderr
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..
read knit index: ..

I often launch bzr commands from inside FTE editor and every time I see
this useless messages.

Does 'read knit index: ..' is really needed?

Alexander

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