chore: fix typos and improve wording

README.md

@@ -40,7 +40,7 @@ Stable structures are able to work directly in stable memory because each data s
 its own memory.
 When initializing a stable structure, a memory is provided that the data structure can use to store its data.
 
-Here's a basic examples:
+Here are some basic examples:
 
 ### Example: BTreeMap
 

src/vec/tests.rs

@@ -249,8 +249,8 @@ fn test_iter_count() {
     }
 }
 
-// A struct with a bugg implementation of storable where the max_size can
-// smaller than the serialized size.
+// A struct with a buggy implementation of `Storable` where the max_size can
+// be smaller than the serialized size.
 #[derive(Clone, Ord, PartialOrd, Eq, PartialEq)]
 struct BuggyStruct(Vec<u8>);
 impl crate::Storable for BuggyStruct {