in src/main/java/com/spotify/github/v3/clients/RepositoryClient.java [705:710]
private String getContentPath(final String path, final String query) {
if (path.startsWith("/") || path.endsWith("/")) {
throw new IllegalArgumentException(path + " starts or ends with '/'");
}
return String.format(CONTENTS_URI_TEMPLATE, owner, repo, path, query);
}