From e167ab338cb07ce702cb6b8564d8d31153539c36 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 13 Apr 2017 11:16:23 +0530
Subject: [PATCH] Fix a bunch of spurious changed conversion options in the log
 when converting from the GUI

---
 src/calibre/ebooks/conversion/plumber.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/conversion/plumber.py b/src/calibre/ebooks/conversion/plumber.py
index d7fa46b2c4..e2ed6dd957 100644
--- a/src/calibre/ebooks/conversion/plumber.py
+++ b/src/calibre/ebooks/conversion/plumber.py
@@ -858,10 +858,20 @@ OptionRecommendation(name='search_replace',
         level is >= the baseline recommended level, the UI value is used,
         *except* if the baseline has a recommendation level of `HIGH`.
         '''
+
+        def eq(name, a, b):
+            if name in {'sr1_search', 'sr1_replace', 'sr2_search', 'sr2_replace', 'sr3_search', 'sr3_replace', 'filter_css'}:
+                if not a and not b:
+                    return True
+            if name in {'transform_css_rules', 'search_replace'}:
+                if b == '[]':
+                    b = None
+            return a == b
+
         for name, val, level in recommendations:
             rec = self.get_option_by_name(name)
             if rec is not None and rec.level <= level and rec.level < rec.HIGH:
-                changed = rec.recommended_value != val
+                changed = not eq(name, rec.recommended_value, val)
                 rec.recommended_value = val
                 rec.level = level
                 if changed: