Update Exercises Directory Names to Reflect Order

exercises/03_if/if1.rs

@@ -0,0 +1,33 @@
+// if1.rs
+//
+// Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
+
+// I AM NOT DONE
+
+pub fn bigger(a: i32, b: i32) -> i32 {
+    // Complete this function to return the bigger number!
+    // Do not use:
+    // - another function call
+    // - additional variables
+}
+
+// Don't mind this for now :)
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn ten_is_bigger_than_eight() {
+        assert_eq!(10, bigger(10, 8));
+    }
+
+    #[test]
+    fn fortytwo_is_bigger_than_thirtytwo() {
+        assert_eq!(42, bigger(32, 42));
+    }
+
+    #[test]
+    fn equal_numbers() {
+        assert_eq!(42, bigger(42, 42));
+    }
+}