Upd README

Author: igorwojda

src/test/kotlin/com/igorwojda/cache/lru/README.md

@@ -13,18 +13,18 @@ The overall run time complexity of each method should be `O(1)`.
 ## Examples
 
 ```kotlin
-val lruCache = LRUCache(3)
-lruCache.size shouldBeEqualTo 0
+val cache = LRUCache(3)
+cache.size shouldBeEqualTo 0
 ```
 
 ```kotlin
-val lruCache = LRUCache(2)
-lruCache.put(1, 10)
-lruCache.put(2, 20)
-lruCache.put(3, 30)
-
-lruCache.size shouldBeEqualTo 2
-lruCache.get(1) shouldBeEqualTo null // value removed due to capacity limit
-lruCache.get(2) shouldBeEqualTo 20
-lruCache.get(3) shouldBeEqualTo 30
+val cache = LRUCache(2)
+cache.put(1, 10)
+cache.put(2, 20)
+cache.put(3, 30)
+
+cache.size shouldBeEqualTo 2
+cache.get(1) shouldBeEqualTo null // value removed due to capacity limit
+cache.get(2) shouldBeEqualTo 20
+cache.get(3) shouldBeEqualTo 30
 ```