fix(fish): Emit clear-screen escape sequence only in left prompt #3588
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Description
Emitting the
[J
escape sequence in right prompt caused problems with fish text rendering, like during multiline input and during menu-completion. This PR restricts the escape sequence to just the left prompt part.Motivation and Context
Closes #3305
Closes #3603
Screenshots (if appropriate):
See the linked issue for more details.
How Has This Been Tested?
Checklist: