refactoring: deleted unnecessary variable declaration, spacing

src/builtins/help.rs

@@ -27,10 +27,9 @@ impl Builtin for Help {
 }
 
 fn split_command(commands: &str) -> Vec<&str> {
-    let mut splitted_command: Vec<&str> = vec![];
     if !commands.is_empty() && commands.trim().len() >= 1 {
-                splitted_command = commands.trim_start().splitn(2, " ").collect();
-                return splitted_command
+        let splitted_command = commands.trim_start().splitn(2, " ").collect();
+        return splitted_command;
     }
     return vec!["", ""];
 }