fix duplicate failure section

.travis.yml

@@ -53,15 +53,6 @@ matrix:
     # Don't wait for allowed failures
     fast_finish: true
 
-    allow_failures:
-        # The astropy 2 test is failing due to obscure tox configuration problems,
-        # not due to actual problems with the code.
-        - os: linux
-          python: 3.6
-          name: Legacy Astropy 2 test
-          stage: Comprehensive tests
-          env: TOXENV=astropy20
-
     include:
 
         # Try MacOS X, usually enough only to run from cron as hardly there are
@@ -143,13 +134,13 @@ matrix:
           env: TOXENV=astropy20
 
     allow_failures:
-        # Do a PEP8 test with flake8
-        # (do allow to fail unless your code completely compliant)
-        # - os: linux
-        #   python: 3.8
-        #   name: Code style checks
-        #   stage: Initial tests
-        #   env: TOXENV=codestyle
+        # The astropy 2 test is failing due to obscure tox configuration problems,
+        # not due to actual problems with the code.
+        - os: linux
+          python: 3.6
+          name: Legacy Astropy 2 test
+          stage: Comprehensive tests
+          env: TOXENV=astropy20
 
 install:
 

docs/todo.rst

@@ -3,6 +3,7 @@ TODO
 ====
 
 * Increase test coverage.
+* Finish documentation of :mod:`~pydl.photoop.window`.
 * :mod:`pydl.pydlutils.mangle` needs more work.
 
   - Area (solid angle) calculation.
@@ -12,4 +13,5 @@ TODO
 
 * Check ``groupdim``, ``groupsize`` in :func:`~pydl.pydlutils.math.djs_reject`.
   Make sure integer division works.
-* Document :class:`~pydl.pydlutils.bspline.bspline`.
+* Document :class:`~pydl.pydlutils.bspline.bspline`, and incorporate changes
+  suggested by the pypit team.