Missing quotes.

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index e338c8777e61af19ad59b1a6748b01bf38de1176..0fddfb236234c539dbf9401d86126a1fd4b520da 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -5355,7 +5355,7 @@ var=$@{var="$default"@}
 If the default value contains a closing brace, then use
 
 @example
-test $@{var+set@} = set || var='$@{indirection@}'
+test "$@{var+set@}" = set || var='$@{indirection@}'
 @end example
 @end enumerate