color: minor reversal of two conditional clause for clarity

Another minor cleanup while reading the code. The two branches of the conditional
have similar complexity so we go for the order that give us the simplest
condition (we drop the negation).

mercurial/color.py

@@ -165,14 +165,14 b' def _render_effects(text, effects):'
     'Wrap text in commands to turn on each effect.'
     if not text:
         return text
-    if not _terminfo_params:
+    if _terminfo_params:
+        start = ''.join(_effect_str(effect)
+                        for effect in ['none'] + effects.split())
+        stop = _effect_str('none')
+    else:
         start = [str(_effects[e]) for e in ['none'] + effects.split()]
         start = '\033[' + ';'.join(start) + 'm'
         stop = '\033[' + str(_effects['none']) + 'm'
-    else:
-        start = ''.join(_effect_str(effect)
-                        for effect in ['none'] + effects.split())
-        stop = _effect_str('none')
     return ''.join([start, text, stop])
 
 w32effects = None