README.md: Remove trailing spaces

README.md

@@ -13,13 +13,13 @@ cache can be saved to and loaded from a file (using `c.Items()` to retrieve the
 items map to serialize, and `NewFrom()` to create a cache from a deserialized
 one) to recover from downtime quickly. (See the docs for `NewFrom()` for caveats.)
 
-When creating a cache object using `NewWithLRU()`, if you set the maxItems value 
-above 0, the LRU functionality is enabled. The cache automatically updates a 
-timestamp every time a given item is retrieved. In the background, the janitor takes 
-care of deleting items that have expired because of staleness, or are 
-least-recently-used when the cache is under pressure. Whatever you set your purge 
+When creating a cache object using `NewWithLRU()`, if you set the maxItems value
+above 0, the LRU functionality is enabled. The cache automatically updates a
+timestamp every time a given item is retrieved. In the background, the janitor takes
+care of deleting items that have expired because of staleness, or are
+least-recently-used when the cache is under pressure. Whatever you set your purge
 interval to controls when the item will actually be removed from the cache. If you
-don't want to use the janitor, and wish to manually purge LRU items, then 
+don't want to use the janitor, and wish to manually purge LRU items, then
 `c.DeleteLRU(n)` where `n` is the number of items you'd like to purge.
 
 ### Installation