Method error_no_implies

tools/fuzz-gen/src/specifications/preparser.rs:566–568

(&self, span: Span)

        syn::Error::new(self.get_error_span(), "unexpected token")
    }
    fn error_no_implies(&self, span: Span) -> syn::Error {
        syn::Error::new(span, "`==>` cannot be part of Rust expression")
    }
    fn error_ambiguous_expression(&self, span: Span) -> syn::Error {
        syn::Error::new(
            span,