Oops

Mathlib/Tactic/Linter/TextBased.lean

@@ -154,7 +154,7 @@ def lint_file (path : System.FilePath) : IO Bool := do
   -- XXX: this list is currently not sorted: for github, that's probably fine
   let errors := Array.flatten all_output
   formatErrors errors
-  return errors.size == 0
+  return errors.size > 0
 
 /-- Lint all files referenced in a given import-only file.
 Return the number of files which had new style errors. -/