`回声 'main(){}' | clang-format -style='{BreakBeforeBraces: Allman}` 不拆分?

`echo 'main(){}' | clang-format -style='{BreakBeforeBraces: Allman}` not split?

为什么此命令不生成在大括号前有行拆分的源代码?

echo 'main(){}' | clang-format -style='{BreakBeforeBraces: Allman}'

我刚从 #llvm IRC 频道收到回复:

jyknight $ because it fits in one line.
jyknight $ $ echo 'main(){foo(); bar();}' | clang-format -style='{BreakBeforeBraces: Allman}'