Use new q ‘format’ flag when fixing quotes in C

* src/image.c (image_size_error): New function.  All uses of
image_error with "Invalid image size ..."  changed to use it.
* src/image.c (image_size_error, xbm_load_image, xbm_load)
(xpm_load, xpm_load_image, xpm_load, pbm_load, png_load_body)
(jpeg_load_body, tiff_load, gif_load, imagemagick_load_image)
(imagemagick_load, svg_load, svg_load_image, gs_load)
(x_kill_gs_process):
* src/lread.c (load_warn_old_style_backquotes):
* src/xfaces.c (load_pixmap):
* src/xselect.c (x_clipboard_manager_error_1):
Use %qs, not uLSQM and uRSQM.
* src/syntax.c (Finternal_describe_syntax_value):
Prefer Fsubstitute_command_keys to Fformat, as this lets
us use AUTO_STRING.
* src/xdisp.c (vadd_to_log): Use AUTO_STRING on the format argument,
as it's now guaranteed to be ASCII.
* src/xselect.c (x_clipboard_manager_error_2):
Avoid grave accent in low-level stderr diagnostic.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/lread.c b/src/lread.c
index 77a62118a39..c342218c532 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -947,8 +947,7 @@ load_warn_old_style_backquotes (Lisp_Object file)
 {
   if (!NILP (Vold_style_backquotes))
     {
-      Lisp_Object format = build_string ("Loading "uLSQM"%s"uRSQM
-                                         ": old-style backquotes detected!");
+      AUTO_STRING (format, "Loading %qs: old-style backquotes detected!");
       CALLN (Fmessage, format, file);
     }
 }