Re: [whatwg/encoding] Concatenating two ISO-2022-JP outputs from a conforming encoder doesn't result in conforming input (#115)

I do not know what "simple nuke the no-op escape sequences" mean, but I hope that Thunderbird will not insert U + FFFD into the result of decoding the following e-mail subject.

Subject: =?ISO-2022-JP?B?IBskQiVXJW0bKEIbJEIlMCVpJWAbKEI=?=
↓
Good:
プログラム

Bad:
プロ�グラム

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