Merge pull request #2035 from tertsdiepraam/ls/hide_and_ignore

ls: add short option for ignore

src/uu/ls/src/ls.rs

@@ -739,6 +739,7 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
         )
         .arg(
             Arg::with_name(options::IGNORE)
+                .short("I")
                 .long(options::IGNORE)
                 .takes_value(true)
                 .multiple(true)