MAINT: fix readthedocs build issue, update numpy version specifier

Also fix a couple of very minor style issues.

Author: rgommers

pywt/_multidim.py

@@ -85,8 +85,6 @@ def idwt2(coeffs, wavelet, mode='symmetric', axes=(-2, -1)):
         Wavelet to use
     mode : str, optional
         Signal extension mode, see Modes (default: 'symmetric')
-        details coefficients 2D arrays like from `dwt2`.  If any of these
-        components are set to ``None``, it will be treated as zeros.
     axes : 2-tuple of ints, optional
         Axes over which to compute the IDWT. Repeated elements mean the IDWT
         will be performed multiple times along these axes.

pywt/tests/test_multilevel.py

@@ -487,7 +487,7 @@ def test_waverec_axes_subsets():
 
 
 def test_waverec_axis_db2():
-    """test for fix to issue gh-293"""
+    # test for fix to issue gh-293
     rstate = np.random.RandomState(0)
     data = rstate.standard_normal((16, 16))
     for axis in [0, 1]:

setup.py

@@ -258,5 +258,5 @@ def install_for_development(self):
         test_suite='nose.collector',
 
         # A function is imported in setup.py, so not really useful
-        install_requires=["numpy"],
+        install_requires=["numpy>=1.9.1"],
     )

util/readthedocs/requirements.txt

@@ -8,7 +8,7 @@
 # fix the versions of numpy to force the use of numpy to use the whl
 # of the rackspace folder instead of trying to install from more recent
 # source tarball published on PyPI
-numpy==1.8.1
+numpy==1.9.1
 Cython==0.20.2
 nose
 wheel