Improve documentation of 'line-number-display-width'
* doc/lispref/display.texi (Size of Displayed Text): Document the additional 2 columns used for line-number display. * src/indent.c (Fline_number_display_width): Doc fix. (Bug#28248)
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@ -2053,8 +2053,9 @@ This function returns the width used for displaying the line numbers
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in the selected window. Optional argument @var{pixelwise}, if
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non-@code{nil}, means return the value in pixels; otherwise the value
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is returned in column units of the font defined for the
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@code{line-number} face. If line numbers are not displayed in the
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selected window, the value is zero. Use @code{with-selected-window}
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@code{line-number} face, and doesn't include the 2 columns used to pad
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the numbers. If line numbers are not displayed in the selected
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window, the value is zero. Use @code{with-selected-window}
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(@pxref{Selecting Windows}) if you need this information about another
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window.
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@end defun
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@ -1993,7 +1993,8 @@ DEFUN ("line-number-display-width", Fline_number_display_width,
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doc: /* Return the width used for displaying line numbers in the selected window.
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If optional argument PIXELWISE is non-nil, return the width in pixels,
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otherwise return the width in columns of the face used to display
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line numbers, `line-number'. */)
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line numbers, `line-number'. Note that in the latter case, the value
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doesn't include the 2 columns used for padding the numbers. */)
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(Lisp_Object pixelwise)
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{
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int width, pixel_width;
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