refactored examples and readme

Author: vivekmaurya001

lib/node_modules/@stdlib/math/base/special/expf/README.md

@@ -93,7 +93,7 @@ var x = uniform( 100, -50.0, 50.0, opts );
 var i;
 
 for ( i = 0; i < 100; i++ ) {
-	console.log( 'e^%f = %f', x[ i ], expf( x[ i ] ) );
+    console.log( 'e^%f = %f', x[ i ], expf( x[ i ] ) );
 }
 ```