Fix deprecated method functional test

Author: Pierre-Sassoulas

tests/functional/d/deprecated_methods_py3.txt

@@ -1,4 +1,4 @@
-deprecated-method:15:MyTest.test:Using deprecated method assert_()
+deprecated-method:15::MyTest.test:Using deprecated method assert_()
 deprecated-method:17::Using deprecated method getchildren()
 deprecated-method:18::Using deprecated method getiterator()
 deprecated-method:19::Using deprecated method doctype()
@@ -9,8 +9,8 @@ deprecated-method:25::Using deprecated method popen()
 deprecated-method:26::Using deprecated method encodestring()
 deprecated-method:27::Using deprecated method decodestring()
 deprecated-method:28::Using deprecated method escape()
-deprecated-method:43:Tests.test_foo:Using deprecated method assertEquals()
-deprecated-method:44:Tests.test_foo:Using deprecated method assertNotEquals()
-deprecated-method:45:Tests.test_foo:Using deprecated method assertAlmostEquals()
-deprecated-method:46:Tests.test_foo:Using deprecated method assertNotAlmostEquals()
-deprecated-method:47:Tests.test_foo:Using deprecated method assert_()
+deprecated-method:43::Tests.test_foo:Using deprecated method assertEquals()
+deprecated-method:44::Tests.test_foo:Using deprecated method assertNotEquals()
+deprecated-method:45::Tests.test_foo:Using deprecated method assertAlmostEquals()
+deprecated-method:46::Tests.test_foo:Using deprecated method assertNotAlmostEquals()
+deprecated-method:47::Tests.test_foo:Using deprecated method assert_()