increase default precision for chi-square, etc from 3 to 5

lmfit/printfuncs.py

@@ -12,7 +12,7 @@ def alphanumeric_sort(s, _nsre=re.compile('([0-9]+)')):
             for text in re.split(_nsre, s)]
 
 
-def getfloat_attr(obj, attr, fmt='%.3f'):
+def getfloat_attr(obj, attr, fmt='%.5f'):
     """Format an attribute of an object for printing."""
     val = getattr(obj, attr, None)
     if val is None: