sage: ignore deprecation warnings in rst2sws

Needs to be fixed upstream (by werkzeug, twisted). Doesn't impact the
functionality and the tests are soon to be removed with the py3 update
anyway.

pkgs/applications/science/math/sage/patches/ignore-cmp-deprecation.patch

@@ -1,13 +1,24 @@
 diff --git a/src/sage/tests/cmdline.py b/src/sage/tests/cmdline.py
-index bd6b76ab82..f8340a8c66 100644
+index bd6b76ab82..ccf1203dec 100644
 --- a/src/sage/tests/cmdline.py
 +++ b/src/sage/tests/cmdline.py
-@@ -872,7 +872,7 @@ def test_executable(args, input="", timeout=100.0, **kwds):
+@@ -837,8 +837,6 @@ def test_executable(args, input="", timeout=100.0, **kwds):
+         ///
+         4
+         }}}
+-        sage: err # py2
+-        ''
+         sage: ret
+         0
+ 
+@@ -871,8 +869,8 @@ def test_executable(args, input="", timeout=100.0, **kwds):
+         sage: output = tmp_filename(ext='.sws')
          sage: with open(input, 'w') as F:
          ....:     _ = F.write(s)
-         sage: test_executable(["sage", "--rst2sws", input, output]) # py2
+-        sage: test_executable(["sage", "--rst2sws", input, output]) # py2
 -        ('', '', 0)
-+        ('', '...', 0)
++        sage: test_executable(["sage", "--rst2sws", input, output])[2] # py2
++        0
          sage: import tarfile # py2
          sage: f = tarfile.open(output, 'r') # py2
          sage: print(f.extractfile('sage_worksheet/worksheet.html').read()) # py2