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Fri, 16 Jul 2004 02:54:41 -0400
In Emacs 20.7, (set-window-start WINDOW POS) makes POS the window
start, as documented. In current CVS and in 21.3, it makes the window
start either at the _beginning_ of the line POS is on, _or_ at the
beginning of the _next_ line, according to rules that are not clear.
I think it is a bug. There is a mechanism that is supposed to assure
that when Emacs chooses a new window-start, it tries to choose
the start of a line. That mechanism should be disabled when you
specify a window-start explicitly. Perhaps the code to disable
it is not working right.