docs: fix example values

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---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/csignum/docs/types/index.d.ts

@@ -33,7 +33,7 @@ import { Complex128 } from '@stdlib/types/complex';
 * var real = require( '@stdlib/complex/float64/real' );
 * var imag = require( '@stdlib/complex/float64/imag' );
 *
-* var v = cceil( new Complex128( -4.2, 5.5 ) );
+* var v = csignum( new Complex128( -4.2, 5.5 ) );
 * // returns <Complex128>
 *
 * var re = real( v );

lib/node_modules/@stdlib/math/base/special/csignum/lib/index.js

@@ -42,7 +42,7 @@
 * // returns <Complex128>
 *
 * re = real( v );
-* // returns -0.0
+* // returns 0.0
 *
 * im = imag( v );
 * // returns 0.0
@@ -51,7 +51,7 @@
 * // returns <Complex128>
 *
 * re = real( v );
-* // returns -NaN
+* // returns NaN
 *
 * im = imag( v );
 * // returns NaN

lib/node_modules/@stdlib/math/base/special/csignum/lib/main.js

@@ -52,7 +52,7 @@ var cabs = require( '@stdlib/math/base/special/cabs' );
 * // returns <Complex128>
 *
 * re = real( v );
-* // returns -0.0
+* // returns 0.0
 *
 * im = imag( v );
 * // returns 0.0

lib/node_modules/@stdlib/math/base/special/csignum/lib/native.js

@@ -51,7 +51,7 @@ var addon = require( './../src/addon.node' );
 * // returns <Complex128>
 *
 * re = real( v );
-* // returns -0.0
+* // returns 0.0
 *
 * im = imag( v );
 * // returns 0.0