Documentation: Add an example for SORT CASES

[pspp] / tests / valgrind.supp

# libfontconfig uses offsets instead of pointers so valgrind doesn't
# recognize when blocks are still in use
{
    fontconfig
    Memcheck:Leak
    ...
    fun:FcFontRenderPrepare
}
{
    fontconfig2
    Memcheck:Leak
    fun:realloc
    obj:*libfontconfig.so.*
}
{
    fontconfig3
    Memcheck:Leak
    fun:malloc
    obj:*libfontconfig.so.*
    ...
    fun:XML_ParseBuffer
}