diff -r d9128c1432af -r 998a3b7cac64 src/pyams_skin/interfaces/__init__.py
--- a/src/pyams_skin/interfaces/__init__.py	Tue Jul 13 08:00:55 2021 +0200
+++ b/src/pyams_skin/interfaces/__init__.py	Tue Jul 13 08:01:21 2021 +0200
@@ -66,7 +66,8 @@
     skin_parent = Attribute("Skin parent (local or inherited)")
 
     skin = Choice(title=_("Custom graphic theme"),
-                  description=_("This theme will be used to handle graphic design (colors and images)"),
+                  description=_("This theme will be used to handle graphic design (colors and "
+                                "images)"),
                   vocabulary='PyAMS user skins',
                   required=False)
 
@@ -83,16 +84,18 @@
                                required=False)
 
     custom_stylesheet = FileField(title=_("Custom stylesheet"),
-                                  description=_("This custom stylesheet will be used to override selected theme styles"),
+                                  description=_("This custom stylesheet will be used to override "
+                                                "selected theme styles"),
                                   required=False)
 
     editor_stylesheet = FileField(title=_("Editor stylesheet"),
-                                  description=_("Styles defined into this stylesheet will be available into HTML editor"),
+                                  description=_("Styles defined into this stylesheet will be "
+                                                "available into HTML editor"),
                                   required=False)
 
     custom_script = FileField(title=_("Custom script"),
-                              description=_("This custom javascript file will be used to add dynamic features to "
-                                            "selected theme"),
+                              description=_("This custom javascript file will be used to add "
+                                            "dynamic features to selected theme"),
                               required=False)