Option handling is broken with braces

[Skillmon]

If the global option list or the package option list of babel contains braces the checks for conflicts in the load order of languages due to global and local options is broken and leads to a Missing \begin{document} error. The problematic code is the code starting in line 4428 of the current babel.sty:

  \bbl@for\bbl@tempb\bbl@tempa{%
    \bbl@xin@{,\bbl@tempb,}{,\bbl@loaded,}%
    \ifin@\edef\bbl@tempc{\bbl@tempb}\fi}

MWE:

\documentclass[foo={bar}]{article}

\usepackage[english]{babel}

\begin{document}
\end{document}

[jbezos]

Formerly the braces were not allowed. I’ll adapt it to this new behavior.

[Skillmon]

@jbezos yes, they weren't. I just noticed that now that they are they break babel :) Thanks for the fix!