docs: update examples

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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/spread-dimensions/README.md

@@ -45,6 +45,7 @@ var spreadDimensions = require( '@stdlib/ndarray/base/spread-dimensions' );
 Expands the shape of an array to a specified dimensionality by spreading its dimensions to specified dimension indices and inserting dimensions of size one for the remaining dimensions.
 
 ```javascript
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
 var array = require( '@stdlib/ndarray/array' );
 
 // Create a 2x2 ndarray:
@@ -58,19 +59,28 @@ var y = spreadDimensions( 3, x, [ 1, 2 ] );
 var sh = y.shape;
 // returns [ 1, 2, 2 ]
 
+var a = ndarray2array( y );
+// returns [ [ [ 1, 2 ], [ 3, 4 ] ] ]
+
 // Append a singleton dimension:
 y = spreadDimensions( 3, x, [ 0, 1 ] );
 // returns <ndarray>
 
 sh = y.shape;
 // returns [ 2, 2, 1 ]
 
+a = ndarray2array( y );
+// returns [ [ [ 1 ], [ 2 ] ], [ [ 3 ], [ 4 ] ] ]
+
 // Insert a singleton dimension:
 y = spreadDimensions( 3, x, [ 0, 2 ] );
 // returns <ndarray>
 
 sh = y.shape;
 // returns [ 2, 1, 2 ]
+
+a = ndarray2array( y );
+// returns [ [ [ 1, 2 ] ], [ [ 3, 4 ] ] ]
 ```
 
 </section>