Add note and test for GetEnvironmentStrings() fix in #1661

CHANGES.txt

@@ -8,6 +8,9 @@ Note that build 228 was the last version supporting Python 2.
 
 Since build 300:
 ----------------
+* Fix a bug in `win32profile.GetEnvironmentStrings()` relating to environment
+  variables with an equals sign (@maxim-krikun in #1661)
+
 * Added win32com.shell.SHGetKnownFolderPath() and related constants.
 
 * Shifted work in win32.lib.pywin32_bootstrap to Python's import system from

win32/test/test_win32profile.py

@@ -0,0 +1,15 @@
+"""Test win32profile"""
+import os
+import unittest
+import win32profile
+
+class Tester(unittest.TestCase):
+    def test_environment(self):
+        os.environ["FOO"] = "bar=baz"
+        env = win32profile.GetEnvironmentStrings()
+        assert "FOO" in env
+        assert env["FOO"] == "bar=baz"
+        assert os.environ["FOO"] == "bar=baz"
+
+if __name__ == '__main__':
+    unittest.main()