line-move-visual

line-move-visual is a variable defined in `simple.el'.
Its value is

t

Documentation:
When non-nil, `line-move' moves point by visual lines.
This movement is based on where the cursor is displayed on the
screen, instead of relying on buffer contents alone. It takes
into account variable-width characters and line continuation.
If nil, `line-move' moves point by logical lines.
A non-nil setting of `goal-column' overrides the value of this variable
and forces movement by logical lines.
A window that is horizontally scrolled also forces movement by logical
lines.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 23.1 of Emacs.