fix: add missing newline to second file

Author: rajanarahul93

lib/node_modules/@stdlib/number/float32/base/to-binary-string/docs/types/index.d.ts

@@ -71,6 +71,7 @@
 * var str = toBinaryStringf( NINF );
 * // returns '11111111100000000000000000000000'
 */
+
 declare function toBinaryStringf( x: number ): string;