Fix typo in docs; Refs #7974

svn path=/trunk/libs/utility/; revision=82729
Fixed typo; Refs #8002

svn path=/trunk/libs/utility/; revision=82771
Update Boost.StringRef tests to use newer Boost.Test features

svn path=/trunk/libs/utility/; revision=82825
Fixed bug in string_ref::find; Refs #8067

svn path=/trunk/boost/utility/; revision=82901
Added to_string and better comparisons to Boost.StringRef

svn path=/trunk/boost/utility/; revision=82902
disable annoying msvc warning, refs #7663

svn path=/trunk/boost/utility/; revision=82960