refactor/env ~ polish spelling (comments, names, and exceptions)
/* last synced with: env (GNU coreutils) 8.13 */
-// spell-checker:ignore (ToDO) execvp progname subcommand subcommands unsets
+// spell-checker:ignore (ToDO) chdir execvp progname subcommand subcommands unsets
#[macro_use]
extern crate clap;
