redefine path with trailing backslash

Question

The following MWE works fine:
documentclass{article}
usepackage{url}
renewcommand{path}[1]{hidden for privacy}
begin{document}
path{C:UserJohn Doe}
end{document}

With a trailing backslash (path{C:UserJohn Doe}) it won't compile. I've got
Runaway argument?
{C:User John Doe} end {document} 
! File ended while scanning use of path.

How can I redefine path that it works with trailing backslashes, too?

daleif · Accepted Answer

You can use xparse and its v type argument specifier. If your LaTeX installation is 100% up to date, xparse is already build into latex
RenewDocumentCommandpath{v}{hidden for privacy}

Full MWE:
documentclass{article}
usepackage{url}
%renewcommand{path}[1]{hidden for privacy}
RenewDocumentCommandpath{v}{hidden for privacy}
begin{document}
path{C:UserJohn Doe}
end{document}

Similar with xparse explicitly loaded
documentclass{article}
usepackage[T1]{fontenc}
usepackage{xparse}
usepackage{url}
%renewcommand{path}[1]{hidden for privacy}
RenewDocumentCommandpath{v}{»Path hidden for privacy«}
begin{document}
path{C:UserJohn Doe}
end{document}

redefine path with trailing backslash

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