Sort the plain table by currency keys

src/main.rs

@@ -85,7 +85,8 @@ async fn main() -> ExitCode {
         FormatOption::Plain => parsed
             .iter()
             .map(|x| {
-                let t: Table = x.clone().into();
+                let mut t: Table = x.clone().into();
+                t.sort();
                 format!("{}", t)
             })
             .collect::<Vec<_>>()

src/table.rs

@@ -37,6 +37,10 @@ impl Table {
     fn add_row(&mut self, row_left: String, row_right: String) {
         self.rows.push((row_left, row_right));
     }
+
+    pub fn sort(&mut self) {
+        self.rows.sort_by(|a, b| a.1.cmp(&b.1))
+    }
 }
 
 impl Display for Table {