CVSROOT:        /cvs
Module name:    src
Changes by:     [email protected]    2012/06/19 10:41:00

Modified files:
        bin/ksh        : sh.1 ksh.1 

Log message:
for arithmetic expressions, note that:
+A parameter that is NULL or unset evaluates to 0.

original diff from robert peichaer
this version from naddy

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