$のみの場合、無限ループにならないように修正 #236
Merged
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fixed #231
元々
echo $'SHELL'のようなコマンドで無限ループになっていた件ですが、echo $のような$のみでも同様に無限ループに陥ることが判明したので対応しました。確認方法
echo $などで$だけ表示され、次のプロンプトが正常に入力できることを確認してください。備考
echo $'SHELL'の場合SHELLと出るのがBash準拠なのですが、minishellだと$SHELLとなります。