Indicate default value

Author: joeyates

lib/imap/backup/cli/single.rb

@@ -104,9 +104,12 @@ class CLI::Single < Thor
       "path",
       type: "string",
       desc: "the path of the directory where backups are to be saved. " \
-            "If the directory does not exists, it will be created. " \
+            "If the directory does not exist, it will be created. " \
             "If not set, this is set to a diretory under the current path " \
-            "which is derived from the username, by replacing '@' with '_'.",
+            "which is derived from the username, by replacing '@' with '_'." \
+            "If this path parameter is not indicated, " \
+            "the default is the current directory plus the email " \
+            "with '@' replaced by '_'.",
       aliases: ["-P"]
     )
     method_option(