Consistently refer to 'the' instead of 'a' repository in help text

src/cmds/restic/cmd_dump.go

@@ -22,7 +22,7 @@ var cmdDump = &cobra.Command{
 	Use:   "dump [indexes|snapshots|trees|all|packs]",
 	Short: "dump data structures",
 	Long: `
-The "dump" command dumps data structures from a repository as JSON objects. It
+The "dump" command dumps data structures from the repository as JSON objects. It
 is used for debugging purposes only.`,
 	RunE: func(cmd *cobra.Command, args []string) error {
 		return runDump(globalOptions, args)

src/cmds/restic/cmd_key.go

@@ -14,7 +14,7 @@ var cmdKey = &cobra.Command{
 	Use:   "key [list|add|rm|passwd] [ID]",
 	Short: "manage keys (passwords)",
 	Long: `
-The "key" command manages keys (passwords) for accessing a repository.
+The "key" command manages keys (passwords) for accessing the repository.
 `,
 	RunE: func(cmd *cobra.Command, args []string) error {
 		return runKey(globalOptions, args)

src/cmds/restic/cmd_list.go

@@ -11,7 +11,7 @@ import (
 
 var cmdList = &cobra.Command{
 	Use:   "list [blobs|packs|index|snapshots|keys|locks]",
-	Short: "list items in the repository",
+	Short: "list objects in the repository",
 	Long: `
 
 `,

src/cmds/restic/cmd_snapshots.go

@@ -15,7 +15,7 @@ var cmdSnapshots = &cobra.Command{
 	Use:   "snapshots",
 	Short: "list all snapshots",
 	Long: `
-The "snapshots" command lists all snapshots stored in a repository.
+The "snapshots" command lists all snapshots stored in the repository.
 `,
 	RunE: func(cmd *cobra.Command, args []string) error {
 		return runSnapshots(snapshotOptions, globalOptions, args)