Fix trailing whitespace in scripts and misc. files

LayoutTests/http/tests/navigation/resources/redirect-to-go-back.pl

 #!/usr/bin/perl
-# Simple script to generate a 302 HTTP redirect to a page that triggers a 
+# Simple script to generate a 302 HTTP redirect to a page that triggers a
 # navigation back (only if POST is used).
 
 use CGI;
 $query = new CGI;
 
 $method = $query->request_method();
 
 if ($method eq "POST") {
     print "Status: 302 Moved Temporarily\r\n";
     print "Location: top-go-back.html\r\n";
     print "\r\n";
 } else {
     print "Status: 405 Method not allowed\r\n";
     print "Content-type: text/plain\r\n";
     print "\r\n";
     print "This should only be requested via POST ($method was used)."
 }