fix spacing

src/vanna/base/base.py

@@ -902,13 +902,13 @@ def run_sql_mysql(sql: str) -> Union[pd.DataFrame, None]:
         self.run_sql_is_set = True
         self.run_sql = run_sql_mysql
 
-     def connect_to_oracle(
+    def connect_to_oracle(
     self,
     user: str = None,
     password: str = None,
     dsn: str = None,
     ):
-        
+
         """
         Connect to an Oracle db using oracledb package. This is just a helper function to set [`vn.run_sql`][vanna.base.base.VannaBase.run_sql]
         **Example:**
@@ -953,23 +953,23 @@ def connect_to_oracle(
             raise ImproperlyConfigured("Please set your Oracle db password")
 
         conn = None
-       
+
         try:
             conn = oracledb.connect(
                 user=user,
                 password=password,
-                dsn=dsn,           
+                dsn=dsn,
                 )
         except oracledb.Error as e:
             raise ValidationError(e)
 
         def run_sql_oracle(sql: str) -> Union[pd.DataFrame, None]:
             if conn:
                 try:
-                    sql = sql.rstrip() 
+                    sql = sql.rstrip()
                     if sql.endswith(';'): #fix for a known problem with Oracle db where an extra ; will cause an error.
-                        sql = sql[:-1]   
-                    
+                        sql = sql[:-1]
+
                     cs = conn.cursor()
                     cs.execute(sql)
                     results = cs.fetchall()
@@ -981,7 +981,7 @@ def run_sql_oracle(sql: str) -> Union[pd.DataFrame, None]:
                     return df
 
                 except oracledb.Error as e:
-                    conn.rollback() 
+                    conn.rollback()
                     raise ValidationError(e)
 
                 except Exception as e: