Fix documentation generation on Windows

doc/extending/op.txt

@@ -289,6 +289,7 @@ node representing the application of Op ``mul`` to inputs ``x`` and
 ``y``, giving a Variable instance of type ``double`` as the output.
 
 .. note::
+
    Theano relies on the fact that if you call the ``make_node`` method
    of Apply's first argument on the inputs passed as the Apply's
    second argument, the call will not fail and the returned Apply
@@ -315,6 +316,7 @@ contain a single storage cell for the multiplication's variable.
 Here, ``z`` is a list of one element. By default, ``z == [None]``.
 
 .. note::
+
    It is possible that ``z`` does not contain ``None``. If it contains
    anything else, Theano guarantees that whatever it contains is what
    ``perform`` put there the last time it was called with this
@@ -324,6 +326,7 @@ Here, ``z`` is a list of one element. By default, ``z == [None]``.
    :ref:`op` documentation.
 
 .. warning::
+
    We gave ``z`` the Theano type ``double`` in ``make_node``, which means
    that a Python ``float`` must be put there. You should not put, say, an
    ``int`` in ``z[0]`` because Theano assumes Ops handle typing properly.

doc/extending/optimization.txt

@@ -232,6 +232,7 @@ arithmetics that your Ops implement. Theano might provide facilities
 for this somewhere in the future.
 
 .. note::
+
    :class:`Env` is a Theano structure intended for the optimization
    phase. It is used internally by function and Module and is rarely
    exposed to the end user. You can use it to test out optimizations,

doc/extending/pipeline.txt

@@ -98,6 +98,7 @@ case if ``borrow`` was True, the thunk would be allowed to reuse (or
 "recycle") the storage).
 
 .. note::
+
     Compiled libraries are stored within a specific compilation directory,
     which by default is set to ``$HOME/.theano/compiledir_xxx``, where
     ``xxx`` identifies the platform (under Windows the default location

doc/scripts/docgen.py

@@ -57,8 +57,9 @@ import getopt
 from collections import defaultdict
 
 if __name__ == '__main__':
-
-    throot = "/".join(sys.path[0].split("/")[:-2])
+    # Equivalent of sys.path[0]/../..
+    throot = os.path.abspath(
+        os.path.join(sys.path[0], os.pardir, os.pardir))
 
     options = defaultdict(bool)
     options.update(dict([x, y or True] for x, y in
@@ -91,7 +92,7 @@ if __name__ == '__main__':
 
     # Make sure the appropriate 'theano' directory is in the PYTHONPATH
     pythonpath = os.environ.get('PYTHONPATH', '')
-    pythonpath = throot + ':' + pythonpath
+    pythonpath = os.pathsep.join([throot, pythonpath])
     os.environ['PYTHONPATH'] = pythonpath
 
     if options['--all'] or options['--epydoc']: