Added usage statements to Array.pod

lib/Type/Array.pod

@@ -13,9 +13,16 @@ scalar containers, which means you can assign to array elements.
 
 =head2 routine pop
 
+Defined as:
+
     multi sub    pop(Array:D )
     multi method pop(Array:D:)
 
+Usage:
+
+    pop ARRAY
+    ARRAY.pop
+
 Removes and returns the last item from the array. Fails for an empty array.
 
 Example:
@@ -31,9 +38,17 @@ Example:
 
 =head2 routine push
 
+Defined as:
+
     multi sub    push(Array:D, *@values) returns Array:D
     multi method push(Array:D: *@values) returns Array:D
 
+Usage:
+
+    push ARRAY, VALUES
+    ARRAY.push(VALUES)
+    ARRAY.push: VALUES
+
 Adds the C<@values> to the end of the array, and returns the modified list.
 Fails for infinite arrays.
 
@@ -45,9 +60,16 @@ Example:
 
 =head2 routine shift
 
+Defined as:
+
     multi sub    shift(Array:D )
     multi method shift(Array:D:)
 
+Usage:
+
+    shift ARRAY
+    ARRAY.shift
+
 Removes and returns the first item from the array. Fails for an empty arrays.
 
 Example:
@@ -59,9 +81,17 @@ Example:
 
 =head2 routine unshift
 
+Defined as:
+
     multi sub    unshift(Array:D, *@values) returns Array:D
     multi method unshift(Array:D: *@values) returns Array:D
 
+Usage:
+
+    unshift ARRAY, VALUES
+    ARRAY.unshift(VALUES)
+    ARRAY.unshift: VALUES
+
 Adds the C<@values> to the start of the array, and returns the modified array.
 Fails if C<@values> is infinite.