Fix typos a -> an

Author: titsuki

README.md

@@ -52,7 +52,7 @@ SYNOPSIS
        }
     }
 
-    # specify Algorithm::MinMaxHeap::Comparable role as a item type
+    # specify Algorithm::MinMaxHeap::Comparable role as an item type
     my $class-heap = Algorithm::MinMaxHeap.new(type => Algorithm::MinMaxHeap::Comparable);
     $class-heap.insert(State.new(value => 0));
     $class-heap.insert(State.new(value => 1));
@@ -98,7 +98,7 @@ METHODS
 
     $heap.insert($item);
 
-Inserts a item to the queue.
+Inserts an item to the queue.
 
 ### pop-max()
 

lib/Algorithm/MinMaxHeap.pm6

@@ -404,7 +404,7 @@ Algorithm::MinMaxHeap - double ended priority queue
      }
   }
 
-  # specify Algorithm::MinMaxHeap::Comparable role as a item type
+  # specify Algorithm::MinMaxHeap::Comparable role as an item type
   my $class-heap = Algorithm::MinMaxHeap.new(type => Algorithm::MinMaxHeap::Comparable);
   $class-heap.insert(State.new(value => 0));
   $class-heap.insert(State.new(value => 1));
@@ -447,7 +447,7 @@ Sets either one of the type objects which you use to insert items to the heap.
 
        $heap.insert($item);
 
-Inserts a item to the queue.
+Inserts an item to the queue.
 
 =head3 pop-max()