Use hugo template for google analytics

https://gohugo.io/templates/internal/#use-the-google-analytics-template

layouts/partials/javascript.html

@@ -6,18 +6,11 @@
 <script type="text/javascript" src="{{ $secureJS.RelPermalink }}" integrity="{{ $secureJS.Data.Integrity }}"></script>
 
 {{- if .Site.GoogleAnalytics }}
-    <script>
-        (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-        m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-        })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-        ga('create', '{{.Site.GoogleAnalytics}}', 'auto');
-        ga('send', 'pageview');
-    </script>
+    {{ template "_internal/google_analytics.html" . }}
 {{- end}}
 
 {{ range $val := $.Site.Params.customJS }}
-	{{ if gt (len $val) 0 }}
-		<script src="{{ $val }}"></script>
-	{{ end }}
+    {{ if gt (len $val) 0 }}
+        <script src="{{ $val }}"></script>
+    {{ end }}
 {{ end }}