Add example to Span.merge()

website/docs/api/span.jade

@@ -150,6 +150,13 @@ p
 
 p Retokenize the document, such that the span is merged into a single token.
 
++aside-code("Example").
+    doc = nlp(u'I like New York in Autumn.')
+    span = doc[2:3]
+    span.merge()
+    assert len(doc) == 6
+    assert doc[2].text == 'New York'
+
 +table(["Name", "Type", "Description"])
     +row
         +cell #[code **attributes]