Strip trailing whitespace in files (#4575)

* Strip trailing whitespace in rs files

* Strip trailing whitespace in toml files

* Strip trailing whitespace in md files

* Strip trailing whitespace in nu files

crates/nu-command/tests/commands/zip.rs

@@ -41,15 +41,15 @@ fn zips_two_tables() {
             &format!(
                 r#"
                 source {} ;
-        
+
                 let contributors = ([
                   [name, commits];
                   [andres,    10]
                   [    jt,    20]
                 ]);
-                        
+
                 let actual = ($contributors | add-commits 10);
-                        
+
                 expect $actual --to-eq [[name, commits]; [andres, 20] [jt, 30]]
                 "#,
                 dirs.test().join("zip_test.nu").display()