Preserve struct field pattern shorthand in the prettyprinter. #18362
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Use the
is_shorthand
field introduced by #17813 (ead6c4b) to make the prettyprinter output the shorthand form. Fixes a few places that setis_shorthand: true
when the pattern is not aPatIdent
with the same name as the field.This fixes incorrect
non_shorthand_field_patterns
warnings when the shorthand is used in a quasiquote, e.g. in rust-peg.