diff --git a/scripts/http-favicon.nse b/scripts/http-favicon.nse
index aa5722a34..c645cca29 100644
--- a/scripts/http-favicon.nse
+++ b/scripts/http-favicon.nse
@@ -27,7 +27,7 @@ a <code><link></code> favicon points to a different host or port, it is ignored.
 --
 -- @usage
 -- nmap --script=http-favicon.nse \
---		--script-args favicon.root=<root>,favicon.uri=<uri>
+--    --script-args favicon.root=<root>,favicon.uri=<uri>
 -- @output
 -- |_ http-favicon: Socialtext
 
@@ -56,124 +56,124 @@ action = function(host, port)
 
   status, favicondb = datafiles.parse_file( favicondbfile, {["^%s*([^%s#:]+)[%s:]+"] = "^%s*[^%s#:]+[%s:]+(.*)"})
   if not status then
-  	stdnse.print_debug( 1, "Could not open file: %s", favicondbfile )
-	return
+    stdnse.print_debug( 1, "Could not open file: %s", favicondbfile )
+    return
   end
 
   if(stdnse.get_script_args('favicon.root')) then
-	root = stdnse.get_script_args('favicon.root')
+    root = stdnse.get_script_args('favicon.root')
   end
   local favicon_uri = stdnse.get_script_args("favicon.uri")
   if(favicon_uri) then
-	-- If we got a script arg URI, always use that.
-  	answer = http.get( host, port, root .. "/" .. favicon_uri)
-	stdnse.print_debug( 4, "Using URI %s", favicon_uri)
+    -- If we got a script arg URI, always use that.
+    answer = http.get( host, port, root .. "/" .. favicon_uri)
+    stdnse.print_debug( 4, "Using URI %s", favicon_uri)
   else
-	-- Otherwise, first try parsing the home page.
- 	index = http.get( host, port, root .. "/" )
-	if index.status == 200 or index.status == 503 then
-		-- find the favicon pattern
-		icon = parseIcon( index.body )
-		-- if we find a pattern
-		if icon then
-			local hostname = host.targetname or (host.name ~= "" and host.name) or host.ip
-			stdnse.print_debug(1, "Got icon URL %s.", icon)
-			local icon_host, icon_port, icon_path = parse_url_relative(icon, hostname, port.number, root)
-			if (icon_host == host.ip or
-				icon_host == host.targetname or
-				icon_host == (host.name ~= '' and host.name)) and
-				icon_port == port.number then
-				-- request the favicon
-				answer = http.get( icon_host, icon_port, icon_path )
-			else
-				answer = nil
-			end
-		else 
-			answer = nil
-		end
-	end
+    -- Otherwise, first try parsing the home page.
+    index = http.get( host, port, root .. "/" )
+    if index.status == 200 or index.status == 503 then
+      -- find the favicon pattern
+      icon = parseIcon( index.body )
+      -- if we find a pattern
+      if icon then
+        local hostname = host.targetname or (host.name ~= "" and host.name) or host.ip
+        stdnse.print_debug(1, "Got icon URL %s.", icon)
+        local icon_host, icon_port, icon_path = parse_url_relative(icon, hostname, port.number, root)
+        if (icon_host == host.ip or
+          icon_host == host.targetname or
+          icon_host == (host.name ~= '' and host.name)) and
+          icon_port == port.number then
+          -- request the favicon
+          answer = http.get( icon_host, icon_port, icon_path )
+        else
+          answer = nil
+        end
+      else 
+        answer = nil
+      end
+    end
 
-	-- If that didn't work, try /favicon.ico.
-	if not answer or answer.status ~= 200 then
-		answer = http.get( host, port, root .. "/favicon.ico" )
-		stdnse.print_debug( 4, "Using default URI.")
-	end
+    -- If that didn't work, try /favicon.ico.
+    if not answer or answer.status ~= 200 then
+      answer = http.get( host, port, root .. "/favicon.ico" )
+      stdnse.print_debug( 4, "Using default URI.")
+    end
   end
 
   --- check for 200 response code
   if answer and answer.status == 200 then
-	md5sum=string.upper(stdnse.tohex(openssl.md5(answer.body)))
-	match=favicondb[md5sum]
-	if match then
-		result = match
-	else
-		if nmap.verbosity() > 0 then
-			result = "Unknown favicon MD5: " .. md5sum 
-		end
-	end
-  else		
-	stdnse.print_debug( 1, "No favicon found.")
-	return
+    md5sum=string.upper(stdnse.tohex(openssl.md5(answer.body)))
+    match=favicondb[md5sum]
+    if match then
+      result = match
+    else
+      if nmap.verbosity() > 0 then
+        result = "Unknown favicon MD5: " .. md5sum 
+      end
+    end
+  else    
+    stdnse.print_debug( 1, "No favicon found.")
+    return
   end --- status == 200
   return result
 end
 
 local function dirname(path)
-	local dir
-	dir = string.match(path, "^(.*)/")
-	return dir or ""
+  local dir
+  dir = string.match(path, "^(.*)/")
+  return dir or ""
 end
 
 -- Return a URL's host, port, and path, filling in the results with the given
 -- host, port, and path if the URL is relative. Return nil if the scheme is not
 -- "http" or "https".
 function parse_url_relative(u, host, port, path)
-	local defaultport, scheme, abspath
-	u = url.parse(u)
-	scheme = u.scheme or "http"
-	if scheme == "http" then
-		defaultport = 80
-	elseif scheme == "https" then
-		defaultport = 443
-	else
-		return nil
-	end
-	abspath = u.path or ""
-	if not string.find(abspath, "^/") then
-		abspath = dirname(path) .. "/" .. abspath
-	end
-	return u.host or host, u.port or defaultport, abspath
+  local defaultport, scheme, abspath
+  u = url.parse(u)
+  scheme = u.scheme or "http"
+  if scheme == "http" then
+    defaultport = 80
+  elseif scheme == "https" then
+    defaultport = 443
+  else
+    return nil
+  end
+  abspath = u.path or ""
+  if not string.find(abspath, "^/") then
+    abspath = dirname(path) .. "/" .. abspath
+  end
+  return u.host or host, u.port or defaultport, abspath
 end
 
 function parseIcon( body )
-	local _, i, j
-	local rel, href, word
+  local _, i, j
+  local rel, href, word
 
-	-- Loop through link elements.
-	i = 0
-	while i do
-		_, i = string.find(body, "<%s*[Ll][Ii][Nn][Kk]%s", i + 1)
-		if not i then
-			return nil
-		end
-		-- Loop through attributes.
-		j = i
-		while true do
-			local name, quote, value
-			_, j, name, quote, value = string.find(body, "^%s*(%w+)%s*=%s*([\"'])(.-)%2", j + 1)
-			if not j then
-				break
-			end
-			if string.lower(name) == "rel" then
-				rel = value
-			elseif string.lower(name) == "href" then
-				href = value
-			end
-		end
-		for word in string.gmatch(rel or "", "%S+") do
-			if string.lower(word) == "icon" then
-				return href
-			end
-		end
-	end
+  -- Loop through link elements.
+  i = 0
+  while i do
+    _, i = string.find(body, "<%s*[Ll][Ii][Nn][Kk]%s", i + 1)
+    if not i then
+      return nil
+    end
+    -- Loop through attributes.
+    j = i
+    while true do
+      local name, quote, value
+      _, j, name, quote, value = string.find(body, "^%s*(%w+)%s*=%s*([\"'])(.-)%2", j + 1)
+      if not j then
+        break
+      end
+      if string.lower(name) == "rel" then
+        rel = value
+      elseif string.lower(name) == "href" then
+        href = value
+      end
+    end
+    for word in string.gmatch(rel or "", "%S+") do
+      if string.lower(word) == "icon" then
+        return href
+      end
+    end
+  end
 end