Create a new Zeal object. I<$path> is an optional colon delimited
string for initializing the object. Each of its components is
recursively scanned for docsets (and can also be a docset itself). If
-<$path> is not provided, the value of I<$ENV{ZEAL_PATH>> (if defined)
+I<$path> is not provided, the value of I<$ENV{ZEAL_PATH}> (if defined)
is used instead.
=item $zeal->B<add>(I<$path>)