natural sort (#474)

Former-commit-id: 9865271f38824fd4762253014a7855ee087d315f [formerly 17c1a5f7e2cbbea4f01ba394f6ae76ded22594f3] [formerly 2087a30cb8fa514b33d99fb9797a0751a8f532cd [formerly 202c9c97e5]]
Former-commit-id: 513ed21a74e590d062f0974b0ea7af7381162df9 [formerly 3fb2617b7aa05abe93460e2ab25ba2369ce68095]
Former-commit-id: a038eda5003c044eeceeea46539f3673ebc16f95

Gopkg.lock

@@ -214,6 +214,12 @@
   revision = "c3beff4c2358b44d0493c7dda585e7db7ff28ae6"
   version = "v1.7.6"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/maruel/natural"
+  packages = ["."]
+  revision = "dbcb3e2e8cf10eb839718ba666ef1e21b1c8b847"
+
 [[projects]]
   name = "github.com/mholt/archiver"
   packages = ["."]

Gopkg.toml

@@ -61,6 +61,10 @@
   name = "gopkg.in/natefinch/lumberjack.v2"
   version = "2.1.0"
 
+[[constraint]]
+  branch = "master"
+  name = "github.com/maruel/natural"
+
 [[override]]
   name = "github.com/russross/blackfriday"
   version = "^1.0.0"

file.go

@@ -20,6 +20,7 @@ import (
 	"time"
 
 	"github.com/gohugoio/hugo/parser"
+	"github.com/maruel/natural"
 )
 
 // File contains the information about a particular file or directory.
@@ -372,7 +373,7 @@ func (l byName) Less(i, j int) bool {
 		return false
 	}
 
-	return strings.ToLower(l.Items[i].Name) < strings.ToLower(l.Items[j].Name)
+	return natural.Less(l.Items[i].Name, l.Items[j].Name)
 }
 
 // By Size