fix(variables): reorder and redo hint texts

exercises/variables/variables1.rs

@@ -1,6 +1,6 @@
 // variables1.rs
 // Make me compile!
-// Execute the command `rustlings hint variables1` if you want a hint :)
+// Execute `rustlings hint variables1` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 

exercises/variables/variables2.rs

@@ -1,13 +1,13 @@
 // variables2.rs
-// Make me compile! Execute the command `rustlings hint variables2` if you want a hint :)
+// Execute `rustlings hint variables2` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 
 fn main() {
     let x;
     if x == 10 {
-        println!("Ten!");
+        println!("x is ten!");
     } else {
-        println!("Not ten!");
+        println!("x is not ten!");
     }
 }

exercises/variables/variables3.rs

@@ -1,11 +1,9 @@
 // variables3.rs
-// Make me compile! Execute the command `rustlings hint variables3` if you want a hint :)
+// Execute `rustlings hint variables3` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 
 fn main() {
-    let x = 3;
-    println!("Number {}", x);
-    x = 5; // don't change this line
+    let x: i32;
     println!("Number {}", x);
 }

exercises/variables/variables4.rs

@@ -1,9 +1,11 @@
 // variables4.rs
-// Make me compile! Execute the command `rustlings hint variables4` if you want a hint :)
+// Execute `rustlings hint variables4` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 
 fn main() {
-    let x: i32;
+    let x = 3;
+    println!("Number {}", x);
+    x = 5; // don't change this line
     println!("Number {}", x);
 }

exercises/variables/variables5.rs

@@ -1,5 +1,5 @@
 // variables5.rs
-// Make me compile! Execute the command `rustlings hint variables5` if you want a hint :)
+// Execute `rustlings hint variables5` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 

exercises/variables/variables6.rs

@@ -1,5 +1,5 @@
 // variables6.rs
-// Make me compile! Execute the command `rustlings hint variables6` if you want a hint :)
+// Execute `rustlings hint variables6` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE