diff --git a/rhodecode/lib/dbmigrate/migrate/changeset/schema.py b/rhodecode/lib/dbmigrate/migrate/changeset/schema.py
--- a/rhodecode/lib/dbmigrate/migrate/changeset/schema.py
+++ b/rhodecode/lib/dbmigrate/migrate/changeset/schema.py
@@ -31,7 +31,7 @@ __all__ = [
 
 def create_column(column, table=None, *p, **kw):
     """Create a column, given the table.
-    
+
     API to :meth:`ChangesetColumn.create`.
     """
     if table is not None:
@@ -41,7 +41,7 @@ def create_column(column, table=None, *p
 
 def drop_column(column, table=None, *p, **kw):
     """Drop a column, given the table.
-    
+
     API to :meth:`ChangesetColumn.drop`.
     """
     if table is not None:
@@ -105,12 +105,12 @@ def alter_column(*p, **k):
     :param engine:
       The :class:`~sqlalchemy.engine.base.Engine` to use for table
       reflection and schema alterations.
-    
+
     :returns: A :class:`ColumnDelta` instance representing the change.
 
-    
+
     """
-    
+
     if 'table' not in k and isinstance(p[0], sqlalchemy.Column):
         k['table'] = p[0].table
     if 'engine' not in k:
@@ -129,7 +129,7 @@ def alter_column(*p, **k):
     # that this crutch has to be left in until they can be sorted
     # out
     k['alter_metadata']=True
-    
+
     delta = ColumnDelta(*p, **k)
 
     visitorcallable = get_engine_visitor(engine, 'schemachanger')
@@ -183,10 +183,10 @@ class ColumnDelta(DictMixin, sqlalchemy.
         :param table: Table at which current Column should be bound to.\
         If table name is given, reflection will be used.
         :type table: string or Table instance
-        
+
         :param metadata: A :class:`MetaData` instance to store
                          reflected table names
-                         
+
         :param engine: When reflecting tables, either engine or metadata must \
         be specified to acquire engine object.
         :type engine: :class:`Engine` instance
@@ -211,7 +211,7 @@ class ColumnDelta(DictMixin, sqlalchemy.
         # as a crutch until the tests that fail when 'alter_metadata'
         # behaviour always happens can be sorted out
         self.alter_metadata = kw.pop("alter_metadata", False)
-        
+
         self.meta = kw.pop("metadata", None)
         self.engine = kw.pop("engine", None)
 
@@ -239,7 +239,7 @@ class ColumnDelta(DictMixin, sqlalchemy.
             self.alter_metadata,
             super(ColumnDelta, self).__repr__()
             )
-    
+
     def __getitem__(self, key):
         if key not in self.keys():
             raise KeyError("No such diff key, available: %s" % self.diffs )
@@ -278,7 +278,7 @@ class ColumnDelta(DictMixin, sqlalchemy.
         """Compares two Column objects"""
         self.process_column(new_col)
         self.table = k.pop('table', None)
-        # we cannot use bool() on table in SA06 
+        # we cannot use bool() on table in SA06
         if self.table is None:
             self.table = old_col.table
         if self.table is None:
@@ -367,7 +367,7 @@ class ColumnDelta(DictMixin, sqlalchemy.
                                             for_update=True))
         if toinit:
             column._init_items(*toinit)
-            
+
         if not SQLA_06:
             column.args = []
 
@@ -484,7 +484,7 @@ class ChangesetColumn(object):
 
     def alter(self, *p, **k):
         """Makes a call to :func:`alter_column` for the column this
-        method is called on. 
+        method is called on.
         """
         if 'table' not in k:
             k['table'] = self.table
@@ -559,12 +559,12 @@ populated with defaults
 
     def _col_name_in_constraint(self,cons,name):
         return False
-    
+
     def remove_from_table(self, table, unset_table=True):
         # TODO: remove primary keys, constraints, etc
         if unset_table:
             self.table = None
-            
+
         to_drop = set()
         for index in table.indexes:
             columns = []
@@ -576,7 +576,7 @@ populated with defaults
             else:
                 to_drop.add(index)
         table.indexes = table.indexes - to_drop
-        
+
         to_drop = set()
         for cons in table.constraints:
             # TODO: deal with other types of constraint
@@ -588,7 +588,7 @@ populated with defaults
                     if self.name==col_name:
                         to_drop.add(cons)
         table.constraints = table.constraints - to_drop
-        
+
         if table.c.contains_column(self):
             table.c.remove(self)