diff --git a/lib/ace/theme/kuroir.css b/lib/ace/theme/kuroir.css
index fe2ba302..9c0ba6a8 100644
--- a/lib/ace/theme/kuroir.css
+++ b/lib/ace/theme/kuroir.css
@@ -50,8 +50,7 @@
 }
 
 .ace-kuroir .ace_fold {
-    background-color: ;
-    border-color: #363636;
+  border-color: #363636;
 }
 
 
@@ -65,4 +64,4 @@ color:#FD1732;
 background-color:#E8E9E8;}.ace-kuroir .ace_string{color:#639300;}.ace-kuroir .ace_string.ace_regexp{color:#417E00;
 background-color:#C9D4BE;}.ace-kuroir .ace_comment{color:rgba(148, 148, 148, 0.91);
 background-color:rgba(220, 220, 220, 0.56);}.ace-kuroir .ace_variable{color:#009ACD;}.ace-kuroir .ace_meta.ace_tag{color:#005273;}.ace-kuroir .ace_markup.ace_heading{color:#B8012D;
-background-color:rgba(191, 97, 51, 0.051);}.ace-kuroir .ace_markup.ace_list{color:#8F5B26;}
\ No newline at end of file
+background-color:rgba(191, 97, 51, 0.051);}.ace-kuroir .ace_markup.ace_list{color:#8F5B26;}