Merge wording suggestion from nih-at#466.

man/zip_get_num_entries.mdoc

@@ -50,7 +50,7 @@ Entries are all files that are present in the original archive or that
 were added while the archive is open.
 This includes deleted files, since
 indices are not renumbered until the archive is closed.
-(This allows to refer to deleted files, e. g. to undelete them.)
+(This allows one to refer to deleted files, e. g. to undelete them.)
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 .Ar flags