docs: fix example code and return annotation values

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---

Author: Planeshifter

lib/node_modules/@stdlib/error/tools/fmtprodmsg-factory/docs/types/index.d.ts

@@ -58,7 +58,7 @@ interface Options {
 *     'url': 'https://stdlib.io/error-decoder.html'
 * };
 *
-* var fcn = factory( opts );
+* var fcn = fmtprodmsgFactory( opts );
 * // returns <Function>
 */
 declare function fmtprodmsgFactory( options?: Options ): FormatProdErrorMsgFunction;

lib/node_modules/@stdlib/error/tools/msg2id/docs/types/index.d.ts

@@ -26,7 +26,7 @@
 *
 * @example
 * var v = msg2id( 'invalid option. `%s` option must be an array. Option: `%s`.' );
-* // returns '8t'
+* // returns '8Z'
 */
 declare function msg2id( msg: string ): string | null;
 

lib/node_modules/@stdlib/error/tools/msg2id/lib/main.js

@@ -43,7 +43,7 @@ var db;
 *
 * @example
 * var v = msg2id( 'invalid option. `%s` option must be an array. Option: `%s`.' );
-* // returns 'GX'
+* // returns '8Z'
 */
 function msg2id( msg ) {
 	if ( !isString( msg ) ) {

lib/node_modules/@stdlib/error/tools/pkg2id/docs/types/index.d.ts

@@ -26,7 +26,7 @@
 *
 * @example
 * var v = pkg2id( '@stdlib/math/base/special/sin' );
-* // returns '0H5'
+* // returns '0YK'
 */
 declare function pkg2id( pkg: string ): string | null;