added rustdoc comments

src/main.rs

@@ -1,5 +1,6 @@
 use fantoccini::{elements::Element, ClientBuilder, Locator};
 
+/// Holds data about stackoverflow answers
 #[derive(Debug, Clone)]
 struct Answer {
     upvotes: u32,
@@ -7,7 +8,9 @@ struct Answer {
     content: String,
 }
 
-// let's set up the sequence of steps we want the browser to take
+/// Get all answers from a stackoverflow domain. No error handling is done so get ready to either
+/// check your input or "note: run with `RUST_BACKTRACE=1` environment variable to display a
+/// backtrace"
 async fn get_answers(url: &str) -> Vec<Answer> {
     let c = ClientBuilder::native()
         .connect("http://localhost:4444")