SYNOPSIS
    string add_gen (string text)

DESCRIPTION
    The approbiate genitiv 's' is added to <text>.
    Result is the possibly modified string.

EXAMPLE
    add_gen("one car")   --> "one car's"
    add_gen("two cars")  --> "two cars'"
    add_gen("Softbyte")  --> "Softbyte's"
    add_gen("Qtx")       --> "Qtx'"

       BUT
    add_gen("Qtx house") --> "Qtx house's" !

SEE ALSO
    strip_gen(SEFUN)