minor comments and style improvements

Former-commit-id: a3a34d0f32125c4da18744b97da796a16d8e056f

ippisite/ippidb/models.py

@@ -168,6 +168,7 @@ class ProteinDomainComplex(models.Model):
     def name(self):
         return self.protein.short_name
 
+
 class ProteinDomainBoundComplex(ProteinDomainComplex):
     ppp_copy_nb_per_p = models.IntegerField(
         'Number of copies of the protein in the pocket')
@@ -442,7 +443,7 @@ class Compound(models.Model):
     @property
     def best_pXC50_activity_ppi_name(self):
         """
-        LE: Ligand Efficiency
+        Name of the PPI corresponding to the best PXC50 activity
         """
         best_activity_car = self.best_pXC50_compound_activity_result
         if best_activity_car is None: