support empty param

src/rougail/annotator.py

@@ -1037,6 +1037,9 @@ class ConstraintAnnotator:
                         raise DictConsistencyError(_(f"All '{param.type}' variables must have a value in order to calculate {fill.target}"))
                     if param.type == 'suffix' and hasattr(param, 'text'):
                         raise DictConsistencyError(_(f"All '{param.type}' variables must not have a value in order to calculate {fill.target}"))
+                    if param.type == 'string':
+                        if not hasattr(param, 'text'):
+                            param.text = None
                     if param.type == 'variable':
                         try:
                             param.text, suffix = self.objectspace.paths.get_variable_path(param.text,

tests/dictionaries/51redefine_remove_check/00-base.xml

@@ -12,7 +12,9 @@
 
     <constraints>
         <check name="valid_enum" target="mode_conteneur_actif">
-            <param>['a','b','c']</param>
+            <param>a</param>
+            <param>b</param>
+            <param>c</param>
         </check>
     </constraints>
 

tests/dictionaries/88valid_enum_not_number/00-base.xml

@@ -17,7 +17,9 @@
 
     <constraints>
         <check name="valid_enum" target="enumvar">
-            <param>['a', 'b', 'c']</param>
+            <param>a</param>
+            <param>b</param>
+            <param>c</param>
         </check>
     </constraints>
 

tests/dictionaries/88valid_enum_numberdefaultstring/00-base.xml

@@ -19,7 +19,9 @@
 
     <constraints>
         <check name="valid_enum" target="enumvar">
-            <param>[1, 2, 3]</param>
+            <param>1</param>
+            <param>2</param>
+            <param>3</param>
         </check>
     </constraints>