From fd7781d6230eb39572991a2308554c9aa3b3c6e3 Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@libreserver.org>
Date: Sun, 5 Jun 2022 11:49:34 +0100
Subject: [PATCH] Handle empty lines

---
 webapp_moderation.py | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/webapp_moderation.py b/webapp_moderation.py
index 1af0f315a..f30357d2f 100644
--- a/webapp_moderation.py
+++ b/webapp_moderation.py
@@ -395,11 +395,15 @@ def html_moderation_info(css_cache: {}, translate: {},
     blocking_filename = base_dir + '/accounts/blocking.txt'
     if os.path.isfile(blocking_filename):
         with open(blocking_filename, 'r') as fp_block:
-            blocked_lines = fp_block.readlines().sort()
+            blocked_lines = fp_block.readlines()
             blocked_str = ''
-            for line in blocked_lines:
-                line = line.replace('\n', '').replace('\r', '').strip()
-                blocked_str += line + '\n'
+            if blocked_lines:
+                blocked_lines.sort()
+                for line in blocked_lines:
+                    if not line:
+                        continue
+                    line = line.replace('\n', '').replace('\r', '').strip()
+                    blocked_str += line + '\n'
             info_form += '<div class="container">\n'
             info_form += \
                 '  <br><b>' + \