Add support for compound shorthand flags (#1414)

* Break multicharacter shorthand flags into single character flags

* Remove shorthand flag test

crates/nu-source/src/meta.rs

@@ -6,6 +6,7 @@ use derive_new::new;
 use getset::Getters;
 use serde::Deserialize;
 use serde::Serialize;
+use std::cmp::Ordering;
 use std::path::{Path, PathBuf};
 
 /// Anchors represent a location that a value originated from. The value may have been loaded from a file, fetched from a website, or parsed from some text
@@ -664,6 +665,18 @@ impl Span {
     }
 }
 
+impl PartialOrd<usize> for Span {
+    fn partial_cmp(&self, other: &usize) -> Option<Ordering> {
+        (self.end - self.start).partial_cmp(other)
+    }
+}
+
+impl PartialEq<usize> for Span {
+    fn eq(&self, other: &usize) -> bool {
+        (self.end - self.start) == *other
+    }
+}
+
 impl language_reporting::ReportingSpan for Span {
     fn with_start(&self, start: usize) -> Self {
         if self.end < start {