typo and message simplification

src/content_generation/ninja_file.rs

@@ -99,7 +99,7 @@ rule cc_{name}
     }
     ret.push_str(&format!(
         "
-  description = Building $in -> $out
+  description = Building $out
 rule link_{name}
   command = "
     ));

src/main.rs

@@ -53,7 +53,7 @@ fn main() {
         .get_inheritance_order()
         .unwrap_or_else(|e| panic!("{e}. cannot continue. Exiting"));
 
-    let mut target_list: TargetList = TargetList(HashMap::new());
+    let mut target_list = TargetList(HashMap::new());
     for order in &inheritance_order {
         for name in order.iter().rev() {
             if target_list.0.get(name as &str).is_some() {