Fix indentation

cmdline/apt-get.cc

@@ -2644,7 +2644,7 @@ bool ShowHelp(CommandLine &CmdL)
       "   upgrade - Perform an upgrade\n"
       "   install - Install new packages (pkg is libc6 not libc6.deb)\n"
       "   remove - Remove packages\n"
-	  "   autoremove - Remove all automatic unused packages\n"
+      "   autoremove - Remove all automatic unused packages\n"
       "   purge - Remove and purge packages\n"
       "   source - Download source archives\n"
       "   build-dep - Configure build-dependencies for source packages\n"