fixed comments and naming

ablescript/src/parser.rs

@@ -416,7 +416,7 @@ impl<'source> Parser<'source> {
         Ok(r)
     }
 
-    /// Parse If flow
+    /// Parse Unless flow
     ///
     /// Consists of condition and block, there is no else
     fn unless_flow(&mut self) -> Result<Stmt, Error> {
@@ -673,7 +673,7 @@ mod tests {
     }
 
     #[test]
-    fn if_flow() {
+    fn unless_flow() {
         let code = "unless (never + never) { /*Buy Able products!*/ print; }";
         let expected = &[Spanned {
             item: Stmt::Unless {