remove underscores

examples/hello-world/src/main.leo

@@ -1,4 +1,4 @@
-// The 'hello_world' main function.
+// The 'hello-world' main function.
 function main(a: u32, b: u32) -> u32 {
     let c: u32 = a + b;
     return c

examples/pedersen-hash/src/main.leo

@@ -17,7 +17,7 @@ circuit PedersenHash {
     }
 }
 
-// The 'pedersen_hash' main function.
+// The 'pedersen-hash' main function.
 function main() -> group {
     const parameters = [1group; 256];
     const pedersen = PedersenHash::new(parameters);

examples/square-root/src/main.leo

@@ -1,4 +1,4 @@
-// The 'square_root' main function.
+// The 'square-root' main function.
 // prove knowledge of the square root `a` of a number `b`
 function main(a: u32, b: u32) -> bool {
     return a * a == b