docs: fix return type

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---

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/ndarray/dcusum/lib/main.js

@@ -34,7 +34,7 @@ var strided = require( '@stdlib/blas/ext/base/dcusum' ).ndarray;
 * Computes the cumulative sum of a one-dimensional double-precision floating-point ndarray.
 *
 * @param {ArrayLikeObject<Object>} arrays - array-like object containing an input ndarray, an output ndarray, and an ndarray containing the initial sum
-* @returns {number} sum
+* @returns {Object} output ndarray
 *
 * @example
 * var Float64Array = require( '@stdlib/array/float64' );

lib/node_modules/@stdlib/blas/ext/base/ndarray/gcusum/lib/main.js

@@ -34,7 +34,7 @@ var strided = require( '@stdlib/blas/ext/base/gcusum' ).ndarray;
 * Computes the cumulative sum of a one-dimensional ndarray.
 *
 * @param {ArrayLikeObject<Object>} arrays - array-like object containing an input ndarray, an output ndarray, and an ndarray containing the initial sum
-* @returns {number} sum
+* @returns {Object} output ndarray
 *
 * @example
 * var ndarray2array = require( '@stdlib/ndarray/to-array' );

lib/node_modules/@stdlib/blas/ext/base/ndarray/scusum/lib/main.js

@@ -34,7 +34,7 @@ var strided = require( '@stdlib/blas/ext/base/scusum' ).ndarray;
 * Computes the cumulative sum of a one-dimensional single-precision floating-point ndarray.
 *
 * @param {ArrayLikeObject<Object>} arrays - array-like object containing an input ndarray, an output ndarray, and an ndarray containing the initial sum
-* @returns {number} sum
+* @returns {Object} output ndarray
 *
 * @example
 * var Float32Array = require( '@stdlib/array/float32' );