Fix grammar issue in CorpusReader docstring

bryant1410 · bryant1410 · commit 27cb773b1b3d · 2015-12-19T11:34:46.000-03:00
diff --git a/nltk/corpus/reader/api.py b/nltk/corpus/reader/api.py
@@ -30,7 +30,7 @@ class CorpusReader(object):
     identified by its ``file identifier``, which is the relative path
     to the file from the root directory.
 
-    A separate subclass is be defined for each corpus format.  These
+    A separate subclass is defined for each corpus format.  These
     subclasses define one or more methods that provide 'views' on the
     corpus contents, such as ``words()`` (for a list of words) and
     ``parsed_sents()`` (for a list of parsed sentences).  Called with
