nltk/doc/Makefile.doc * fixed directive for book.rst (issue with .rst2 extensions not yet built)
nltk/doc/Makefile.doc
* fixed directive for book.rst (issue with .rst2 extensions not yet built)

doc/en/ch*.rst
* more work fixing examples

nltk/text.py
* increased concordance width to 79 characters


svn/trunk@7165

nltk/nltk,nltk/nltk,nltk/nltk