util.dependencies: Make the commands line up properly in the "missing dependency" output. Yes, this was the commit you didn't know you were waiting for!

author: Matthew Wild <mwild1@gmail.com>
date: Mon, 23 Nov 2009 02:58:42 +0000
parent: 1523:841d61be198f
child: 2160:0ef04962e112
--- a/util/dependencies.lua	Sun Nov 22 21:09:25 2009 +0000
+++ b/util/dependencies.lua	Mon Nov 23 02:58:42 2009 +0000
@@ -17,8 +17,12 @@
 	print("Prosody was unable to find "..tostring(name));
 	print("This package can be obtained in the following ways:");
 	print("");
-	for k,v in pairs(sources) do
-		print("", k, v);
+	local longest_platform = 0;
+	for platform in pairs(sources) do
+		longest_platform = math.max(longest_platform, #platform);
+	end
+	for platform, source in pairs(sources) do
+		print("", platform..":"..(" "):rep(4+longest_platform-#platform)..source);
 	end
 	print("");
 	print(msg or (name.." is required for Prosody to run, so we will now exit."));