Remove unnecessary block in awkward match

Author: gepbird

src/flow_control/if_let.md

@@ -7,11 +7,7 @@ For some use cases, when matching enums, `match` is awkward. For example:
 let optional = Some(7);
 
 match optional {
-    Some(i) => {
-        println!("This is a really long string and `{:?}`", i);
-        // ^ Needed 2 indentations just so we could destructure
-        // `i` from the option.
-    },
+    Some(i) => println!("This is a really long string and `{:?}`", i),
     _ => {},
     // ^ Required because `match` is exhaustive. Doesn't it seem
     // like wasted space?