parse_format: treat r" as a literal #81828
Merged
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This PR changes
format_args!
internal parsing machinery to treat raw strings startingr"
as a literal.Currently
"
andr#
are recognised as valid starting combinations for string literals, butr"
is not.This was noticed when debugging #67984 (comment)
As well as fixing the behavior observed in that comment, this improves diagnostic spans for
r"
formatting strings.