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       %!      Each element of "%!" has a true value only if $! is set
+ to that
               value.  For example, $!{ENOENT} is true if and only if 
+the
...
               on your system, use "exists $!{the_key}"; for a list of
+ legal
               keys, use "keys %!".  See Errno for more information, a
+nd also
               see above for the validity of $!.