The string is also added to the @file{*Messages*} buffer, but without
text properties (@pxref{Logging Messages}).
-In a format string containing single quotes, curved quotes @t{‘like
-this’} and grave quotes @t{`like this'} work better than straight
-quotes @t{'like this'}, as @code{message} typically formats every
-straight quote as a curved closing quote.
+The @code{text-quoting-style} variable controls what quotes are
+generated; @xref{Keys in Documentation}. A call using a format like
+@t{"Missing `%s'"} with grave accents and apostrophes typically
+generates a message like @t{"Missing ‘foo’"} with matching curved
+quotes. In contrast, a call using a format like @t{"Missing '%s'"}
+with only apostrophes typically generates a message like @t{"Missing
+’foo’"} with only closing curved quotes, an unusual style in English.
In batch mode, the message is printed to the standard error stream,
followed by a newline.
If the property value is @code{t}, the newline character has no
effect on the displayed height of the line---the visible contents
-alone determine the height. This is useful for tiling small images
-(or image slices) without adding blank areas between the images.
+alone determine the height. The @code{line-spacing} property,
+described below, is also ignored in this case. This is useful for
+tiling small images (or image slices) without adding blank areas
+between the images.
If the property value is a list of the form @code{(@var{height}
@var{total})}, that adds extra space @emph{below} the display line.
First Emacs uses @var{height} as a height spec to control extra space
@emph{above} the line; then it adds enough space @emph{below} the line
-to bring the total line height up to @var{total}. In this case, the
-other ways to specify the line spacing are ignored.
+to bring the total line height up to @var{total}. In this case, any
+value of @code{line-spacing} property for the newline is ignored.
@cindex height spec
Any other kind of property value is a height spec, which translates
@kindex line-spacing @r{(text property)}
Finally, a newline can have a @code{line-spacing} text or overlay
-property that overrides the default frame line spacing and the buffer
-local @code{line-spacing} variable, for the display line ending in
-that newline.
+property that can enlarge the default frame line spacing and the
+buffer local @code{line-spacing} variable: if its value is larger than
+the buffer or frame defaults, that larger value is used instead, for
+the display line ending in that newline.
One way or another, these mechanisms specify a Lisp value for the
spacing of each line. The value is a height spec, and it translates
@itemx bold-italic
@itemx underline
@itemx fixed-pitch
+@itemx fixed-pitch-serif
@itemx variable-pitch
These have the attributes indicated by their names (e.g., @code{bold}
has a bold @code{:weight} attribute), with all other attributes
for images loaded via ImageMagick is @code{imagemagick}, regardless of
the actual underlying image format.
+To check for ImageMagick support, use the following:
+
+@lisp
+(image-type-available-p 'imagemagick)
+@end lisp
+
@defun imagemagick-types
This function returns a list of image file extensions supported by the
current ImageMagick installation. Each list element is a symbol