bpo-36919: make test_source_encoding.test_issue2301 implementation-independent (GH-13639) (GH-15952)

* bpo-36919: make test_issue2301 implementation-independent
(cherry picked from commit b6643dcfc26859f935e4b3a6a2a203e8ef5320e2)

Co-authored-by: Pavel Koneski <pavel.koneski@gmail.com>
diff --git a/Lib/test/test_source_encoding.py b/Lib/test/test_source_encoding.py
index 3873400..a0bd741 100644
--- a/Lib/test/test_source_encoding.py
+++ b/Lib/test/test_source_encoding.py
@@ -31,7 +31,7 @@
         try:
             compile(b"# coding: cp932\nprint '\x94\x4e'", "dummy", "exec")
         except SyntaxError as v:
-            self.assertEqual(v.text, "print '\u5e74'\n")
+            self.assertEqual(v.text.rstrip('\n'), "print '\u5e74'")
         else:
             self.fail()
 
diff --git a/Misc/NEWS.d/next/Tests/2019-05-28-15-41-34.bpo-36919.-vGt_m.rst b/Misc/NEWS.d/next/Tests/2019-05-28-15-41-34.bpo-36919.-vGt_m.rst
new file mode 100644
index 0000000..9400bdd
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2019-05-28-15-41-34.bpo-36919.-vGt_m.rst
@@ -0,0 +1,2 @@
+Make ``test_source_encoding.test_issue2301`` implementation independent. The
+test will work now for both CPython and IronPython.