Chrome DevToolsのConsoleで以下を実行
gitlab.js
document.getElementsByTagName("head")[0].insertAdjacentHTML("beforeend",'<style type="text/css">* { tab-size: 4 !important; }</style>');
Chrome DevToolsのConsoleで以下を実行
document.getElementsByTagName("head")[0].insertAdjacentHTML("beforeend",'<style type="text/css">* { tab-size: 4 !important; }</style>');