Ashish Myles 1ee98ba880 Make screen reader announcement append a non-breaking space every other message. (flutter/engine#50151)
This fixes an issue when the same message was sent to the screen reader
again and was not subsequently announced by VoiceOver despite the prior
message having long been removed from the DOM.

Fixes https://github.com/flutter/flutter/issues/142250
2024-01-31 17:30:15 -05:00
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