BUG: fix signedRatStr for near-integer numbers

Author: pavoljuhas

src/diffpy/structure/symmetryutilities.py

@@ -362,7 +362,7 @@ def signedRatStr(self, x):
 
         Return string.
         """
-        s = str(x)
+        s = "{:.8g}".format(x)
         if len(s) < 6:  return "%+g" % x
         den = numpy.array([3.0, 6.0, 7.0, 9.0])
         nom = x * den

src/diffpy/structure/tests/testsymmetryutilities.py

@@ -211,7 +211,6 @@ def test___init__(self):
         return
 
 
-    @unittest.expectedFailure
     def test_signedRatStr(self):
         "check GeneratorSite.signedRatStr()"
         g = self.g117c