Use convergent_round everywhere except for round() LESS function.

The LESS function round uses away-from-zero rounding.

lesscpy/lessc/color.py

@@ -105,7 +105,7 @@ class Color():
             if isinstance(s, str):
                 s = int(s.strip('%'))
             rgb = colorsys.hls_to_rgb(int(h) / 360.0, l / 100.0, s / 100.0)
-            color = (round(c * 255) for c in rgb)
+            color = (utility.convergent_round(c * 255) for c in rgb)
             return self._rgbatohex(color)
         raise ValueError('Illegal color values')
 
@@ -123,8 +123,8 @@ class Color():
             if isinstance(s, str):
                 s = int(s.strip('%'))
             rgb = colorsys.hls_to_rgb(int(h) / 360.0, l / 100.0, s / 100.0)
-            color = [float(round(c * 255)) for c in rgb]
-            color.append(round(float(a[:-1]) / 100.0, 2))
+            color = [float(utility.convergent_round(c * 255)) for c in rgb]
+            color.append(utility.convergent_round(float(a[:-1]) / 100.0, 2))
             return "rgba(%s,%s,%s,%s)" % tuple(color)
         raise ValueError('Illegal color values')
 
@@ -139,7 +139,7 @@ class Color():
         """
         if color:
             h, l, s = self._hextohls(color)
-            return round(h * 360.0, 3)
+            return utility.convergent_round(h * 360.0, 3)
         raise ValueError('Illegal color values')
 
     def saturation(self, color, *args):
@@ -260,7 +260,7 @@ class Color():
             h = ((h * 360.0) + degree) % 360.0
             h = 360.0 + h if h < 0 else h
             rgb = colorsys.hls_to_rgb(h / 360.0, l, s)
-            color = (round(c * 255) for c in rgb)
+            color = (utility.convergent_round(c * 255) for c in rgb)
             return self._rgbatohex(color)
         raise ValueError('Illegal color values')
 
@@ -364,5 +364,5 @@ class Color():
         hls = list(self._hextohls(color))
         hls[idx] = self._clamp(getattr(hls[idx], op)(diff / 100.0))
         rgb = colorsys.hls_to_rgb(*hls)
-        color = (round(c * 255) for c in rgb)
+        color = (utility.convergent_round(c * 255) for c in rgb)
         return self._rgbatohex(color)

lesscpy/test/css/calls.css

@@ -6,6 +6,8 @@
 	decrement: 9;
 	rounded: 11;
 	roundedpx: 3px;
+	round25: 3;
+	round15: 2;
 }
 #escapes {
 	escaped: -Some::weird(#thing, y);

lesscpy/test/css/calls.min.css

@@ -1,4 +1,4 @@
-#standard{width:16;height:undefined("self");border-width:5;variable:11;decrement:9;rounded:11;roundedpx:3px;}
+#standard{width:16;height:undefined("self");border-width:5;variable:11;decrement:9;rounded:11;roundedpx:3px;round25:3;round15:2;}
 #escapes{escaped:-Some::weird(#thing, y);escaped1:-Some::weird(#thing, z);eformat:rgb(32, 128, 64);}
 #format{format:"rgb(32, 128, 64)";format-string:"hello world";format-multiple:"hello earth 2";format-url-encode:'red is %23ff0000';}
 #more{width:2px;height:1px;top:50%;}

lesscpy/test/less/calls.less

@@ -11,6 +11,8 @@
   	decrement: decrement(@var);
   	rounded: round(@r/3);
   	roundedpx: round(10px / 3);
+        round25: round(2.5);
+        round15: round(1.5);
 }
 #escapes {
   	escaped: e("-Some::weird(#thing, y)");