add test

spacy/tests/regression/test_issue1758.py

@@ -0,0 +1,13 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import pytest
+
+
+@pytest.mark.parametrize('text', ["would've"])
+def test_issue1758(en_tokenizer, text):
+    """Test that "would've" is handled by the English tokenizer exceptions."""
+    tokens = en_tokenizer(text)
+    assert len(tokens) == 2
+    assert tokens[0].tag_ == "MD"
+    assert tokens[1].lemma_ == "have"