diff --git a/arcanist/linter/PythonFormatLinter.php b/arcanist/linter/PythonFormatLinter.php
--- a/arcanist/linter/PythonFormatLinter.php
+++ b/arcanist/linter/PythonFormatLinter.php
@@ -15,7 +15,7 @@
   }
 
   public function getInfoDescription() {
-    return pht('Convert python string formatting from % to .format().');
+    return pht('Convert python string formatting from %% to .format().');
   }
 
   public function getLinterName() {