Improve example in "CLI arguments as data type"

Show the complete `main()` function.
Also, fix code indentation and a wrong line number in include.

src/tutorial/cli-args-struct.rs

@@ -6,12 +6,11 @@ struct Cli {
 }
 
 fn main() {
+    let pattern = std::env::args().nth(1).expect("no pattern given");
+    let path = std::env::args().nth(2).expect("no path given");
 
-let pattern = std::env::args().nth(1).expect("no pattern given");
-let path = std::env::args().nth(2).expect("no path given");
-let args = Cli {
-    pattern: pattern,
-    path: std::path::PathBuf::from(path),
-};
-
+    let args = Cli {
+        pattern: pattern,
+        path: std::path::PathBuf::from(path),
+    };
 }

src/tutorial/cli-args.md

@@ -65,7 +65,7 @@ way of looking at CLI arguments fits very well. Let's start with this (in file
 `src/main.rs`, before `fn main() {`):
 
 ```rust,ignore
-{{#include cli-args-struct.rs:3:7}}
+{{#include cli-args-struct.rs:3:6}}
 ```
 
 This defines a new structure (a [`struct`])
@@ -89,7 +89,7 @@ and build the structure ourselves.
 It would look something like this:
 
 ```rust,ignore
-{{#include cli-args-struct.rs:10:15}}
+{{#include cli-args-struct.rs:8:16}}
 ```
 
 This works, but it's not very convenient.