From 154ceb6340f5e45a37ad8c709b5ae917b3060817 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 4 Jul 2017 12:57:19 +0530
Subject: [PATCH] ...

---
 manual/custom.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/manual/custom.py b/manual/custom.py
index 149ba57752..e769d97c38 100644
--- a/manual/custom.py
+++ b/manual/custom.py
@@ -240,7 +240,7 @@ def render_options(cmd, groups, options_header=True, add_program=True, header_le
 
 def mark_options(raw):
     if 'CALIBRE_BUILD_MAN_PAGES' not in os.environ:
-        raw = re.sub(r'(\s+)--(\s+)', ur'\1-\u200b-\2', raw)
+        raw = re.sub(r'(\s+)--(\s+)', ur'\1-\N{ZERO WIDTH SPACE}-\2', raw)
 
     def sub(m):
         opt = m.group()