Fix commit view (#10169)

Signed-off-by: jolheiser <john.olheiser@gmail.com>

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>

web_src/less/_repository.less

@@ -2534,7 +2534,7 @@ td.blob-excerpt {
 }
 
 .diff-file-box[data-folded="true"] .diff-file-body {
-    visibility: hidden;
+    display: none;
 }
 
 .diff-file-box[data-folded="true"] .diff-file-header {