Wait it was just an issue of single quotes versus double quotes, because single quotes are valid in filenames

cmd/root.go

@@ -12,7 +12,7 @@ import (
 )
 
 const (
-	ReleaseVersion string = "3.2.5"
+	ReleaseVersion string = "3.2.6"
 )
 
 var (

cmd/sort.go

@@ -6,7 +6,6 @@ package cmd
 
 import (
 	"fmt"
-	"net/url"
 	"sort"
 	"strings"
 
@@ -91,14 +90,6 @@ Loop:
 	return first, last, nil
 }
 
-func pathUrlEscape(path string) string {
-	placeholder := strings.Replace(path, "/", "path_placeholder", -1)
-
-	escaped := url.QueryEscape(placeholder)
-
-	return strings.Replace(escaped, "path_placeholder", "/", -1)
-}
-
 func paginateSorted(path, first, last, queryParams string, regexes *regexes, formats types.Types) (string, error) {
 	split, err := split(path, regexes)
 	if err != nil {
@@ -153,31 +144,31 @@ func paginateSorted(path, first, last, queryParams string, regexes *regexes, for
 
 	html.WriteString(`<table style="margin-left:auto;margin-right:auto;"><tr><td>`)
 
-	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = '%s%s%s%s';"%s>First</button>`,
+	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = "%s%s%s%s";"%s>First</button>`,
 		Prefix,
 		mediaPrefix,
-		pathUrlEscape(first),
+		first,
 		queryParams,
 		firstStatus))
 
-	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = '%s%s%s%s';"%s>Prev</button>`,
+	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = "%s%s%s%s";"%s>Prev</button>`,
 		Prefix,
 		mediaPrefix,
-		pathUrlEscape(prevPage),
+		prevPage,
 		queryParams,
 		prevStatus))
 
-	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = '%s%s%s%s';"%s>Next</button>`,
+	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = "%s%s%s%s";"%s>Next</button>`,
 		Prefix,
 		mediaPrefix,
-		pathUrlEscape(nextPage),
+		nextPage,
 		queryParams,
 		nextStatus))
 
-	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = '%s%s%s%s';"%s>Last</button>`,
+	html.WriteString(fmt.Sprintf(`<button onclick="window.location.href = "%s%s%s%s";"%s>Last</button>`,
 		Prefix,
 		mediaPrefix,
-		pathUrlEscape(last),
+		last,
 		queryParams,
 		lastStatus))