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by smerritt 6161 days ago
This is the default behavior in Emacs 23.1.

Most of the time, it makes editing text easier, as one would expect. The exception is when using a keyboard macro to do something to a bunch of lines. It's common for such macros to have a form like

1) start at the beginning of the line 2) do stuff to the line 3) go to the beginning of the next line

When the navigation commands take line wrap into effect, you can wind up with a macro that gets run once on short lines, but twice on long lines.