Fix paginator with uglyurls

Fixes #1120

hugolib/pagination.go

@@ -23,6 +23,7 @@ import (
 	"math"
 	"path"
 	"reflect"
+	"strings"
 )
 
 type Pager struct {
@@ -268,6 +269,8 @@ func paginatePages(seq interface{}, pagerSize int, section string) (pagers, erro
 		return nil, err
 	}
 
+	section = strings.TrimSuffix(section, ".html")
+
 	urlFactory := newPaginationURLFactory(section)
 	paginator, _ := newPaginator(pages, pagerSize, urlFactory)
 	pagers := paginator.Pagers()

hugolib/pagination_test.go

@@ -172,7 +172,6 @@ func TestPaginate(t *testing.T) {
 }
 
 func doTestPaginate(t *testing.T, useViper bool) {
-
 	pagerSize := 5
 	if useViper {
 		viper.Set("paginate", pagerSize)