avoid test failure seen on rawhide

File
"/builddir/build/BUILD/networkx-1.8.1/site-packages/networkx/algorithms/assortativity/correlation.py",
line 118, in

Failed example:
    r
Expected:
    -0.5
Got:
    -0.50000000000000011

python-networkx.spec

@@ -21,6 +21,7 @@ Source1:        http://networkx.github.io/documentation/latest/_downloads/networ
 Source2:        http://networkx.github.io/documentation/latest/_downloads/networkx_tutorial.pdf
 Source3:        http://networkx.github.io/documentation/latest/_downloads/networkx-documentation.zip
 Patch0:         optional-modules.patch
+Patch1:         test-rounding-fix.patch
 BuildArch:      noarch
 
 Requires:       %{name}-core = %{version}-%{release}
@@ -165,6 +166,7 @@ Documentation for networkx
 %prep
 %setup -q -n networkx-%{version}
 %patch0 -p1
+%patch1 -p1
 
 # Fix permissions
 find examples -type f -perm /0111 | xargs chmod a-x

test-rounding-fix.patch

@@ -0,0 +1,14 @@
+This was seen intermittently
+
+diff -Naur networkx-1.8.1.orig/networkx/algorithms/assortativity/correlation.py networkx-1.8.1/networkx/algorithms/assortativity/correlation.py
+--- networkx-1.8.1.orig/networkx/algorithms/assortativity/correlation.py	2013-08-04 13:53:31.000000000 +0000
++++ networkx-1.8.1/networkx/algorithms/assortativity/correlation.py	2014-03-17 11:11:25.710772149 +0000
+@@ -115,7 +115,7 @@
+     --------
+     >>> G=nx.path_graph(4)
+     >>> r=nx.degree_pearson_correlation_coefficient(G) 
+-    >>> r 
++    >>> print("%.1f"%r)
+     -0.5
+ 
+     Notes