Remove sourceMappingURL lines from tinymce static files

tests/test_static_files.py

@@ -0,0 +1,22 @@
+import tempfile
+
+from django.core.management import call_command
+from django.test import SimpleTestCase
+
+
+class TestStaticFiles(SimpleTestCase):
+
+    def test_manifest_static_files_storage(self):
+        """
+        Test that TinyMCE's static files can be collected
+        when using ManifestStaticFilesStorage - missing
+        .map files can cause this to fail if the static
+        files refer to them (GH issue #460)
+        """
+        with tempfile.TemporaryDirectory() as temp_dir:
+            with self.settings(
+                STATIC_ROOT=temp_dir,
+                STATICFILES_STORAGE="django.contrib.staticfiles.storage.ManifestStaticFilesStorage",
+            ):
+                result = call_command("collectstatic", "--no-input")
+                self.assertRegex(result, r"\d+ static files copied")