Add regression test for #775

spacy/tests/regression/test_issue775.py

@@ -0,0 +1,13 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import pytest
+
+
+@pytest.mark.parametrize('text', ["Shell", "shell"])
+def test_issue775(en_tokenizer, text):
+    """Test that 'Shell' and 'shell' are excluded from the contractions
+    generated by the English tokenizer exceptions."""
+    tokens = en_tokenizer(text)
+    assert len(tokens) == 1
+    assert tokens[0].text == text