test: cleanup rpc_getchaintips.py

Remove whitespace that doesn't conform with pep8 and turn some
comments into log messages.

Author: mzumsande

test/functional/rpc_getchaintips.py

@@ -18,44 +18,45 @@ def set_test_params(self):
         self.num_nodes = 4
 
     def run_test(self):
+        self.log.info("Test getchaintips behavior with two chains of different length")
         tips = self.nodes[0].getchaintips()
         assert_equal(len(tips), 1)
         assert_equal(tips[0]['branchlen'], 0)
         assert_equal(tips[0]['height'], 200)
         assert_equal(tips[0]['status'], 'active')
 
-        # Split the network and build two chains of different lengths.
+        self.log.info("Split the network and build two chains of different lengths.")
         self.split_network()
         self.generate(self.nodes[0], 10, sync_fun=lambda: self.sync_all(self.nodes[:2]))
         self.generate(self.nodes[2], 20, sync_fun=lambda: self.sync_all(self.nodes[2:]))
 
-        tips = self.nodes[1].getchaintips ()
-        assert_equal (len (tips), 1)
+        tips = self.nodes[1].getchaintips()
+        assert_equal(len(tips), 1)
         shortTip = tips[0]
-        assert_equal (shortTip['branchlen'], 0)
-        assert_equal (shortTip['height'], 210)
-        assert_equal (tips[0]['status'], 'active')
+        assert_equal(shortTip['branchlen'], 0)
+        assert_equal(shortTip['height'], 210)
+        assert_equal(tips[0]['status'], 'active')
 
-        tips = self.nodes[3].getchaintips ()
-        assert_equal (len (tips), 1)
+        tips = self.nodes[3].getchaintips()
+        assert_equal(len(tips), 1)
         longTip = tips[0]
-        assert_equal (longTip['branchlen'], 0)
-        assert_equal (longTip['height'], 220)
-        assert_equal (tips[0]['status'], 'active')
+        assert_equal(longTip['branchlen'], 0)
+        assert_equal(longTip['height'], 220)
+        assert_equal(tips[0]['status'], 'active')
 
-        # Join the network halves and check that we now have two tips
+        self.log.info("Join the network halves and check that we now have two tips")
         # (at least at the nodes that previously had the short chain).
-        self.join_network ()
+        self.join_network()
 
-        tips = self.nodes[0].getchaintips ()
-        assert_equal (len (tips), 2)
-        assert_equal (tips[0], longTip)
+        tips = self.nodes[0].getchaintips()
+        assert_equal(len(tips), 2)
+        assert_equal(tips[0], longTip)
 
-        assert_equal (tips[1]['branchlen'], 10)
-        assert_equal (tips[1]['status'], 'valid-fork')
+        assert_equal(tips[1]['branchlen'], 10)
+        assert_equal(tips[1]['status'], 'valid-fork')
         tips[1]['branchlen'] = 0
         tips[1]['status'] = 'active'
-        assert_equal (tips[1], shortTip)
+        assert_equal(tips[1], shortTip)
 
 if __name__ == '__main__':
     GetChainTipsTest(__file__).main()