Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/regress/regress-1919169.js

Index: test/mjsunit/regress/regress-1919169.js
diff --git a/test/mjsunit/regress/regress-1919169.js b/test/mjsunit/regress/regress-1919169.js
index 774f26558d1f72da1e946ee6949511ccdcfc6346..a73231289ff5894d3447d6473aa7f17665c70a33 100644
--- a/test/mjsunit/regress/regress-1919169.js
+++ b/test/mjsunit/regress/regress-1919169.js
@@ -30,7 +30,7 @@ function test() {
  var s2 = "s2";
  for (var i = 0; i < 2; i++) {
    // Crashes in round i==1 with IllegalAccess in %StringAdd(x,y)
-   var res = 1 + s2;  
+   var res = 1 + s2;
    s2 = 2;
  }
 }