docs: Fix indentation in "genkernel --help"

gen_cmdline.sh

@@ -93,10 +93,10 @@ longusage() {
   echo "	--luks			Include LUKS support"
   echo "				--> 'emerge cryptsetup-luks' with USE=-dynamic"
   echo "	--gpg			Include GPG-armored LUKS key support"
-  echo "	--no-busybox    Do not include busybox in the initramfs."
-  echo "	--unionfs       Include support for unionfs"
-  echo "	--netboot       Create a self-contained env in the initramfs"
-  echo "	--real-root=<foo> Specify a default for real_root="
+  echo "	--no-busybox		Do not include busybox in the initramfs."
+  echo "	--unionfs		Include support for unionfs"
+  echo "	--netboot		Create a self-contained env in the initramfs"
+  echo "	--real-root=<foo>	Specify a default for real_root="
   echo "  Internals"
   echo "	--arch-override=<arch>	Force to arch instead of autodetect"
   echo "	--cachedir=<dir>	Override the default cache location"