replacing "31" with RED constant

servo · d-jh · May 22, 2016 · May 22, 2016 · May 22, 2016 · f44afa823035e4b2e134d4a4965c3f21b4893607
commit f44afa823035e4b2e134d4a4965c3f21b4893607
diff --git a/tests/lint/trailing_whitespace.py b/tests/lint/trailing_whitespace.py
@@ -8,7 +8,7 @@ def display_trailing_whitespace(whitespace):
     # Show trailing whitespace with printing characters and in red
     # To make it easy to see what needs to be removed
     replaced = whitespace.replace(' ', '-').replace('\t', r'\t')
-    return color(31, replaced)
+    return color(RED, replaced)
 
 
 def display_failure(failure):