fixed small problem with prover_modifiers

ROADMAP

@@ -194,7 +194,9 @@ Bug fix:
 * do "make distrib"
 * test the distrib why3-0.73.tar.gz
 * make a last commit:
- - add tag 0.73 to the git repository (do not forget to push it)
+ - add tag 0.73 to the git repository 
+ - do not forget to push it using git push --tags
+
 * put on the web page
  - why3-0.73.tar.gz
  - standard library online, using why3doc, to http://why3.lri.fr/stdlib/

src/driver/whyconf.ml

@@ -570,9 +570,9 @@ let merge_config config filename =
     let version = get_stringo section "version" in
     let altern = get_stringo section "alternative" in
     mk_filter_prover ?version ?altern name in
-  let prover_modifiers = get_family rc "prover_modifiers" in
+  let prover_modifiers = get_simple_family rc "prover_modifiers" in
   let prover_modifiers =
-    List.map (fun (_,sec) -> create_filter_prover sec, sec) prover_modifiers in
+    List.map (fun sec -> create_filter_prover sec, sec) prover_modifiers in
   (** add provers *)
   let provers = List.fold_left
     (fun provers (fp, section) ->