Match semantics of SubcommandRequiredElseHelp

Author: Jon Gjengset

src/bin/cargo/commands/config.rs

@@ -6,6 +6,7 @@ pub fn cli() -> App {
         .about("Inspect configuration values")
         .after_help("Run `cargo help config` for more detailed information.\n")
         .subcommand_required(true)
+        .arg_required_else_help(true)
         .subcommand(
             subcommand("get")
                 .arg(Arg::new("key").help("The config key to display"))

src/bin/cargo/commands/report.rs

@@ -7,6 +7,7 @@ pub fn cli() -> App {
         .about("Generate and display various kinds of reports")
         .after_help("Run `cargo help report` for more detailed information.\n")
         .subcommand_required(true)
+        .arg_required_else_help(true)
         .subcommand(
             subcommand("future-incompatibilities")
                 .alias("future-incompat")