I am trying to fix Spirit docs https://github.com/boostorg/spirit/blob/develop/doc/lex/lexer.qbk#L34, but having troubles with bogus warning or broken escaping.
Given:
[[`"[xyz]\"foo"`] [The literal string `[xyz]"foo`]]
Renders correctly:

But generates a warning:
lex/lexer.qbk:34: warning: in column:50, unexpected character: "
Fixing it like this:
[[`"[xyz]\"foo"`] [The literal string `[xyz]\"foo`]]
Does not eliminate it:
lex/lexer.qbk:34: warning: in column:51, unexpected character: "
And leads to incorrect rendering:

I am trying to fix Spirit docs https://github.com/boostorg/spirit/blob/develop/doc/lex/lexer.qbk#L34, but having troubles with bogus warning or broken escaping.
Given:
Renders correctly:

But generates a warning:
Fixing it like this:
Does not eliminate it:
And leads to incorrect rendering:
