colourflood.pl: fix indentation in help

scripts/colourflood.pl

@@ -36,20 +36,20 @@ my $SCRIPT_LICENCE = 'BSD';
 my $SCRIPT_DESC = 'A-rab style ircing';
 
 my $USAGE = <<EOF;
-	options:
-		-r      Random back & foreground colours (default)
-		-f      Amount of times the message is flooded
-		-fg     font colour, available colours:
-			        black, blue, green
-			        lightred, red, magenta, orange
-			        yellow, lightgreen, cyan,
-			        lightcyan, lightblue,
-			        lightmagenta, gray, lightgray.
-		-bg     background colour, available colours:
-			        black, blue, green, red,
-			        magenta, orange, green, cyan,
-			        lightcyan, lightblue,
-			        lightmagenta, gray, lightgray
+options:
+    -r      Random back & foreground colours (default)
+    -f      Amount of times the message is flooded
+    -fg     font colour, available colours:
+                black, blue, green
+                lightred, red, magenta, orange
+                yellow, lightgreen, cyan,
+                lightcyan, lightblue,
+                lightmagenta, gray, lightgray.
+    -bg     background colour, available colours:
+                black, blue, green, red,
+                magenta, orange, green, cyan,
+                lightcyan, lightblue,
+                lightmagenta, gray, lightgray
 EOF
 
 our %clr = (