Macro block located inside a quotation is not parsed correctly

When parsing markdown/1.2 content, a macro block located inside a quotation is parsed incorrectly: the macro name, parameters and content are mangled.

Steps to reproduce

Parse:

> {{info}}
> x
> {{/info}}

Result

onMacroStandalone [{{in] [fo=] [x
> {{/info}}...]

Expected

An info macro with content x, inside the quotation.