m4/sage_spkg_enable.m4: Cosmetic change to help strings

Author: Matthias Koeppe

m4/sage_spkg_enable.m4

@@ -14,7 +14,7 @@ AC_DEFUN([SAGE_SPKG_ENABLE], [dnl
     AC_ARG_ENABLE(SPKG_NAME,
       AS_HELP_STRING([--enable-]SPKG_NAME={no|if_installed⁽ᵈᵉᶠᵃᵘˡᵗ⁾|yes},
                      [enable build and use of the SPKG_TYPE package $3], [26], [100])
-AS_HELP_STRING([], [package info: ./sage -info SPKG_NAME])
+AS_HELP_STRING([], [* package info: ./sage -info SPKG_NAME])
 AS_HELP_STRING([--disable-]SPKG_NAME,
                      [disable build and uninstall if previously installed by Sage in PREFIX; same as --enable-]SPKG_NAME[=no], [26], [100]),
       AS_VAR_SET([SAGE_ENABLE_]SPKG_NAME, [$enableval])