Function readFile

Support/SingleFileLibs/javascript/app.js:297–297

(r, path)

      dependencies: state.dependencyGraph,
      async listTree() { return tree.tree; },
      async readFile(r, path) { return await fetchFileCached(r, path); },
      async getVersionString(r) {
        const sha = await getCommitShaForRef(r);
        const shortSha = sha.slice(0,7);