CLI: Remove "(optional)" from command argument help #1735

Should be clear enough like that.

internal/commands/convert.go

@@ -16,8 +16,8 @@ import (
 // ConvertCommand registers the convert cli command.
 var ConvertCommand = cli.Command{
 	Name:      "convert",
-	Usage:     "Transcodes other formats to JPEG and AVC",
-	ArgsUsage: "[originals subfolder (optional)]",
+	Usage:     "Converts files in other formats to JPEG and AVC",
+	ArgsUsage: "[originals subfolder]",
 	Action:    convertAction,
 }
 

internal/commands/faces.go

@@ -53,7 +53,7 @@ var FacesCommand = cli.Command{
 		{
 			Name:      "index",
 			Usage:     "Searches originals for faces",
-			ArgsUsage: "[originals subfolder (optional)]",
+			ArgsUsage: "[originals subfolder]",
 			Action:    facesIndexAction,
 		},
 		{

internal/commands/index.go

@@ -21,7 +21,7 @@ import (
 var IndexCommand = cli.Command{
 	Name:      "index",
 	Usage:     "Indexes original media files",
-	ArgsUsage: "[originals subfolder (optional)]",
+	ArgsUsage: "[originals subfolder]",
 	Flags:     indexFlags,
 	Action:    indexAction,
 }