Trim trailing whitespace

Making sure that none of the actual test files were touched.

doc/fancontrol.txt

@@ -1,4 +1,3 @@
-
 fancontrol - automated software based fan speed regulation
 
 

lib/test/test-scanner.c

@@ -103,4 +103,3 @@ int main(void)
 
 	return 0;
 }
-

lib/test/test-scanner.pl

@@ -98,4 +98,3 @@ foreach $scenario (@scenarios) {
 	ok($test->diff_exact(\@stderr, \@experr, \@diff),
 		"stderr: " . $scenario->{"desc"}) or print @diff;
 }
-