src/utils/file.js
function readAsString(repoState, filepath, encoding) {
    const blob = read(repoState, filepath);
    return blob.getAsString(encoding);
}
function readAsString(repoState, filepath, encoding) {
    const blob = read(repoState, filepath);
    return blob.getAsString(encoding);
}
Read content of a file, returns a String
@return {String}