typos (#41)

* that to than

* add missing s

* an to a

Next letter is a consonant sound

book/src/05_ticket_v2/02_match.md

@@ -23,7 +23,7 @@ impl Status {
 ```
 
 A `match` statement that lets you compare a Rust value against a series of **patterns**.  
-You can think of it as a type-level `if`. If `status` is an `Done` variant, execute the first block;
+You can think of it as a type-level `if`. If `status` is a `Done` variant, execute the first block;
 if it's a `InProgress` or `ToDo` variant, execute the second block.
 
 ## Exhaustiveness