[Bug 223524] whatis 'c++' fails with regex error

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223524

--- Comment #2 from Wolfram Schneider <wosch at FreeBSD.org> ---
On FreeBSD 10.4-STABLE I can run a apropos keyword search for c++

$ whatis 'c\+\+'    
clang(1)                 - the Clang C, C++, and Objective-C compiler

I can search without quotes, and don't get an error message
$ whatis 'c++' 

If something changed and is no longer working, I consider it a bug and it needs
to be fixed.

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