Tab/spaces consistency for templates

templates/lxc-alpine.in

@@ -336,11 +336,16 @@ apk_arch=$arch
 
 case "$arch" in
     i[3-6]86)
-		apk_arch=x86;;
+        apk_arch=x86
+        ;;
     x86)
-		lxc_arch=i686;;
-	x86_64|"") ;;
-	*)	die "unsupported architecture: $arch";;
+        lxc_arch=i686
+        ;;
+    x86_64|"")
+        ;;
+    *)
+        die "unsupported architecture: $arch"
+        ;;
 esac
 
 : ${APK:=apk}