feat(functions): more small fixes

exercises/functions/functions1.rs

@@ -1,5 +1,5 @@
 // functions1.rs
-// Make me compile! Execute `rustlings hint functions1` for hints :)
+// Execute `rustlings hint functions1` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 

exercises/functions/functions2.rs

@@ -1,5 +1,5 @@
 // functions2.rs
-// Make me compile! Execute `rustlings hint functions2` for hints :)
+// Execute `rustlings hint functions2` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 

exercises/functions/functions3.rs

@@ -1,5 +1,5 @@
 // functions3.rs
-// Make me compile! Execute `rustlings hint functions3` for hints :)
+// Execute `rustlings hint functions3` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 

exercises/functions/functions4.rs

@@ -1,8 +1,11 @@
 // functions4.rs
-// Make me compile! Execute `rustlings hint functions4` for hints :)
+// Execute `rustlings hint functions4` or use the `hint` watch subcommand for a hint.
 
 // This store is having a sale where if the price is an even number, you get
 // 10 Rustbucks off, but if it's an odd number, it's 3 Rustbucks off.
+// (Don't worry about the function bodies themselves, we're only interested
+// in the signatures for now. If anything, this is a good way to peek ahead
+// to future exercises!)
 
 // I AM NOT DONE
 

exercises/functions/functions5.rs

@@ -1,11 +1,11 @@
 // functions5.rs
-// Make me compile! Execute `rustlings hint functions5` for hints :)
+// Execute `rustlings hint functions5` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 
 fn main() {
     let answer = square(3);
-    println!("The answer is {}", answer);
+    println!("The square of 3 is {}", answer);
 }
 
 fn square(num: i32) -> i32 {

info.toml

@@ -114,7 +114,9 @@ path = "exercises/functions/functions3.rs"
 mode = "compile"
 hint = """
 This time, the function *declaration* is okay, but there's something wrong
-with the place where we're calling the function."""
+with the place where we're calling the function.
+As a reminder, you can freely play around with different solutions in Rustlings!
+Watch mode will only jump to the next exercise if you remove the I AM NOT DONE comment."""
 
 [[exercises]]
 name = "functions4"
@@ -123,7 +125,10 @@ mode = "compile"
 hint = """
 The error message points to line 14 and says it expects a type after the
 `->`. This is where the function's return type should be-- take a look at
-the `is_even` function for an example!"""
+the `is_even` function for an example!
+
+Also: Did you figure out that, technically, u32 would be the more fitting type
+for the prices here, since they can't be negative? If so, kudos!"""
 
 [[exercises]]
 name = "functions5"