From 5d00117f449b4431602e9685757cef9b92f78e21 Mon Sep 17 00:00:00 2001
From: Charles Haley <>
Date: Thu, 13 Jan 2011 19:09:03 +0000
Subject: [PATCH] Convert leading tabs to 4 spaces

---
 src/calibre/utils/formatter_functions.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/calibre/utils/formatter_functions.py b/src/calibre/utils/formatter_functions.py
index a17903004f..b0895ce1b3 100644
--- a/src/calibre/utils/formatter_functions.py
+++ b/src/calibre/utils/formatter_functions.py
@@ -449,8 +449,13 @@ class FormatterUserFunction(FormatterFunction):
         self.arg_count = arg_count
         self.program_text = program_text
 
+tabs = re.compile(r'^\t*')
 def compile_user_function(name, doc, arg_count, eval_func):
-    func = '\t' + eval_func.replace('\n', '\n\t')
+    def replace_func(mo):
+        return  mo.group().replace('\t', '    ')
+
+    func = '    ' + '\n    '.join([tabs.sub(replace_func, line )
+                                   for line in eval_func.splitlines()])
     prog = '''
 from calibre.utils.formatter_functions import FormatterUserFunction
 class UserFunction(FormatterUserFunction):