Revert "rss: don't minify whitespace in xml"

This reverts commit 41843eba32.

config/_default/hugo.toml

@@ -60,30 +60,3 @@ enableInlineShortcodes = true
   tag = "tags"
   series = "series"
 
-# Copied from https://gohugo.io/getting-started/configuration/#configure-minify
-# Only change made is xml keepWhitespace = true
-[minify]
-  disableCSS = false
-  disableHTML = false
-  disableJS = false
-  disableJSON = false
-  disableSVG = false
-  disableXML = false
-  minifyOutput = false
-  [minify.tdewolff]
-    [minify.tdewolff.css]
-      decimals = -1
-      keepCSS2 = true
-    [minify.tdewolff.html]
-      keepConditionalComments = true
-      keepDefaultAttrVals = true
-      keepDocumentTags = true
-      keepEndTags = true
-      keepQuotes = false
-      keepWhitespace = false
-    [minify.tdewolff.js]
-    [minify.tdewolff.json]
-    [minify.tdewolff.svg]
-      decimals = -1
-    [minify.tdewolff.xml]
-      keepWhitespace = true

layouts/_default/rss.xml

@@ -10,7 +10,7 @@
 {{- if ge $limit 1 -}}
 {{- $pages = $pages | first $limit -}}
 {{- end -}}
-{{- printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
+<!-- {{- printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }} -->
 <rss version="2.0"
   xmlns:atom="http://www.w3.org/2005/Atom"
   xmlns:content="http://purl.org/rss/1.0/modules/content/"