Merge branch 'fix-main' into 'master'

error handling in main

See merge request mhart/DancingDroids!14

src/main.rs

@@ -64,9 +64,10 @@ fn open_file(filename: &str) -> io::Result<String> {
     Ok(content)
 }
 
-fn main() {
+fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut robot_pool: Vec<Robot> = Vec::new();
-    let raw_conf = open_file("two_robots.txt");
+    let raw_conf = open_file("two_robots.txt")?;
+    Ok(())
 }
 
 #[cfg(test)]