diff --git a/002.ts b/002.ts
index 5209041..9fc27d6 100644
--- a/002.ts
+++ b/002.ts
@@ -39,7 +39,8 @@ declare function verifyOIB(oib: string): boolean;
 
 function payTaxes(entity: Human | Company): void {
     verifyOIB(entity.oib);
-    // entity.companyName; -> Property 'companyName' does not exist on type 'Human'.ts(2339)
+    // entity.companyName;
+    // result: Property 'companyName' does not exist on type 'Human'.ts(2339)
 
     let name: string;
     if ('companyName' in entity) {
diff --git a/003.ts b/003.ts
index eceea00..bd5f29e 100644
--- a/003.ts
+++ b/003.ts
@@ -36,7 +36,7 @@ let _myObject: ObjectInterface;
 _myObject!.a // string
 _myObject!.b // string
 
-// Side note: Notice the `!` part, use it wisely
+// Side note: Notice the `!` operator, use it wisely
 
 // This throws an error:
 // type ObjectType = {
diff --git a/007.ts b/007.ts
index d9c8f4e..f47b077 100644
--- a/007.ts
+++ b/007.ts
@@ -101,7 +101,9 @@ type ImmutableObject<T> = { readonly [K in keyof T]: Immutable<T[K]> };
  * };
  * type ResultType = KeyOfType<ExampleType, 'x'>; // "a" | "b" | "c" | "d" | "e"
  */
-declare type KeyOfType<T, Type> = { [K in keyof T]: T[K] extends Type ? K : never}[keyof T];
+declare type KeyOfType<T, Type> = {
+    [K in keyof T]: T[K] extends Type ? K : never
+}[keyof T];
 
  /**
   * Get all keys of `T` that are assignable to `Type`.
@@ -118,7 +120,9 @@ declare type KeyOfType<T, Type> = { [K in keyof T]: T[K] extends Type ? K : neve
   * };
   * type ResultType = KeyWithType<ExampleType, 'x'>; // "a" | "b" | "c" | "d" | "f"
   */
-declare type KeyWithType<T, Type> = { [K in keyof T]: Type extends T[K] ? K : never}[keyof T];
+declare type KeyWithType<T, Type> = {
+    [K in keyof T]: Type extends T[K] ? K : never
+}[keyof T];
 
 
 // ---
diff --git a/008.tsx b/008.tsx
index 2209f72..1a3447a 100644
--- a/008.tsx
+++ b/008.tsx
@@ -69,7 +69,7 @@ interface OwnProps {
     id: number;
 }
 
-function mapStateToProps<T>(rootState: RootStoreState, ownProps: OwnProps) {
+function mapStateToProps(rootState: RootStoreState, ownProps: OwnProps) {
     return {
         value: rootState.targetReducer.lookup[ownProps.id]
     }