diff --git a/hgext/highlight/highlight.py b/hgext/highlight/highlight.py
--- a/hgext/highlight/highlight.py
+++ b/hgext/highlight/highlight.py
@@ -57,7 +57,7 @@ def pygmentize(field, fctx, style, tmpl,
         return
 
     # str.splitlines() != unicode.splitlines() because "reasons"
-    for c in b"\x0c\x1c\x1d\x1e":
+    for c in b"\x0c", b"\x1c", b"\x1d", b"\x1e":
         if c in text:
             text = text.replace(c, b'')