Seems GitHub changed some selectors
@ -367,7 +367,9 @@ svg.octicon.octicon-star.dashboard-event-icon {
.tab-size[data-tab-size='4'],
.tab-size[data-tab-size='8'],
.inline-review-comment,
.gist table.lines {
.gist table.lines,
.highlight pre, /* Readme code blocks */
.blob-code-inner /* PR inline diff */ {
tab-size: 4 !important;
}