removed trailing whitespace

tests/libtest/test610.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/env perl
 # Perform simple file and directory manipulation in a portable way
-if ( $#ARGV <= 0 ) 
+if ( $#ARGV <= 0 )
 {
 	print "Usage: $0 mkdir|rmdir|rm|move|gone path1 [path2] [more commands...]\n";
 	exit 1;