Update README.md

Signed-off-by: Harsh <[email protected]>

Author: hrshya

lib/node_modules/@stdlib/stats/incr/nanmape/README.md

@@ -125,12 +125,12 @@ accumulator = incrnanmape();
 // For each simulated datum, update the mean absolute percentage error...
 for ( i = 0; i < 100; i++ ) {
     if ( randu() < 0.2 ) {
-		v1 = NaN;
-		v2 = NaN;
-	} else {
-		v1 = ( randu()*100.0 ) + 50.0;
+        v1 = NaN;
+        v2 = NaN;
+    } else {
+        v1 = ( randu()*100.0 ) + 50.0;
         v2 = ( randu()*100.0 ) + 50.0;
-	}
+    }
     accumulator( v1, v2 );
 }
 console.log( accumulator() );