bug#8196: 23.1; Feature request with code: "C-x TAB" to understand tab-stop-list

[Drew Adams]

> If you want a command that indents rigidly a certain number of tab stops...
> 
> (defun indent-rigidly-to-tab-stop (start end nth)

Clearly I used a bad name.  Should have used something like
`indent-rigidly-tab-stops'.  It specifically does NOT try to indent TO any
tab stop.  Sorry about that.