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-rw-r--r--grc/gui/BlockTreeWindow.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/grc/gui/BlockTreeWindow.py b/grc/gui/BlockTreeWindow.py
index 900cbd3151..258b8b787f 100644
--- a/grc/gui/BlockTreeWindow.py
+++ b/grc/gui/BlockTreeWindow.py
@@ -58,7 +58,8 @@ undocumented#slurp
CAT_MARKUP_TMPL = """
#set $name = $cat[-1]
#if len($cat) > 1
-Category: $cat[-1]
+#silent from xml.sax.saxutils import escape
+Category: #echo escape($cat[-1])
##
#elif $name == 'Core'
Module: Core