commands: Map --minify CLI flag to the correct configuration key

Closes #13988

commands/helpers.go

@@ -76,7 +76,7 @@ func flagsToCfgWithAdditionalConfigBase(cd *simplecobra.Commandeer, cfg config.P
 
 	// Flags with a different name in the config.
 	keyMap := map[string]string{
-		"minify":      "minifyOutput",
+		"minify":      "minify.minifyOutput",
 		"destination": "publishDir",
 		"editor":      "newContentEditor",
 	}

testscripts/commands/hugo__minify_issue13988.txt

@@ -0,0 +1,13 @@
+hugo --minify --logLevel=info
+
+! stderr 'deprecated'
+grep '<p>one</p><p>two</p>'  public/index.html
+
+-- hugo.toml --
+disableKinds = ['page','rss','section','sitemap','taxonomy','term']
+-- content/_index.md --
+one
+
+two
+-- layouts/all.html --
+{{ .Content }}