Fix errors in README examples

README.md

@@ -17,7 +17,7 @@ The following is a non-comprehensive list of stuff that currently works.
 ```
 a: str = "Hello, World!\n";
 b: int = 0;
-c: str;
+c: str; // declared, but not yet assigned
 ```
 
 ## Structs
@@ -70,7 +70,7 @@ enum IntResult {
 	Err(Error)
 }
 
-result: IntResult = Ok(5);
+result: IntResult = IntResult.Ok(5);
 
 match result in {
 	case Ok(num) do { ... } // num is defined in this scope
@@ -86,14 +86,14 @@ func random_number(seed: int) -> int {
 	return 42;
 }
 
-my_random_number = random_number(69);
+my_random_number: int = random_number(69);
 
 func min(a: int, b: int) -> int {
 	if a < b return a;
 	return b;
 }
 
-the_min = min(5, 10);
+the_min: int = min(5, 10);
 ```
 
 ## Arrays