Whitespace cleanup: tab removal in tests directory

Also changed space-based indentation in touched files if they used
4 spaces for indentation (instead of the most-often-used 2).

Also added new line to end of touched files if they did not end
that way.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

tests/jerry/array-prototype-slice.js

@@ -91,11 +91,11 @@ var obj = { slice : Array.prototype.slice };
 Object.defineProperty(obj, 'length', { 'get' : function () { throw new ReferenceError ("foo"); } });
 
 try {
-	obj.slice(1, 2);
-	assert (false);
+  obj.slice(1, 2);
+  assert (false);
 } catch (e) {
-	assert (e.message === "foo");
-	assert (e instanceof ReferenceError);
+  assert (e.message === "foo");
+  assert (e instanceof ReferenceError);
 }
 
 // Checking behavior when unable to get element
@@ -103,9 +103,9 @@ var obj = { length : 1, slice : Array.prototype.slice };
 Object.defineProperty(obj, '0', { 'get' : function () { throw new ReferenceError ("foo"); } });
 
 try {
-	obj.slice(0, 1);
-	assert (false);
+  obj.slice(0, 1);
+  assert (false);
 } catch (e) {
-	assert (e.message === "foo");
-	assert (e instanceof ReferenceError);
+  assert (e.message === "foo");
+  assert (e instanceof ReferenceError);
 }