style: sort includes and avoid assignments

* src/symtab.c: Sort includes.
* src/gram.c (grammar_rules_print_xml): Avoid assignments to define
'usefulness'.

src/gram.c

@@ -218,13 +218,10 @@ grammar_rules_print_xml (FILE *out, int level)
         xml_puts (out, level + 1, "<rules>");
       first = false;
       {
-        char const *usefulness;
+        char const *usefulness
-        if (rule_useless_in_grammar_p (&rules[r]))
+          = rule_useless_in_grammar_p (&rules[r]) ? "useless-in-grammar"
-          usefulness = "useless-in-grammar";
+          : rule_useless_in_parser_p (&rules[r])  ? "useless-in-parser"
-        else if (rule_useless_in_parser_p (&rules[r]))
+          :                                         "useful";
-          usefulness = "useless-in-parser";
-        else
-          usefulness = "useful";
         xml_indent (out, level + 2);
         fprintf (out, "<rule number=\"%d\" usefulness=\"%s\"",
                  rules[r].number, usefulness);

src/symtab.c

@@ -19,13 +19,14 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
+#include "symtab.h"
+
 #include "system.h"
 
 #include <hash.h>
 
 #include "complain.h"
 #include "gram.h"
-#include "symtab.h"
 
 /*-------------------------------------------------------------------.
 | Symbols sorted by tag.  Allocated by the first invocation of       |