message: Add report subcommand to bash completion.
diff: @@ -71,6 +71,8 @@ _cargo()
  local opt__pkgid="$opt_common $opt_mani $opt_lock $opt_pkg"
  local opt__publish="$opt_common $opt_mani $opt_feat $opt_lock $opt_jobs --allow-dirty --dry-run --token --no-verify --index --registry --target --target-dir"
  local opt__read_manifest="$opt_help $opt_quiet $opt_verbose $opt_mani $opt_color $opt_lock --no-deps"
  + local opt__report="$opt_help $opt_verbose $opt_color future-incompat future-incompatibilities"
  + local opt__report__future_incompat="$opt_help $opt_verbose $opt_color $opt_pkg --id"
  local opt__run="$opt_common $opt_pkg $opt_feat $opt_mani $opt_lock $opt_jobs --message-format --target --bin --example --release --target-dir --profile"
  local opt__r="$opt__run"
  local opt__rustc="$opt_common $opt_pkg $opt_feat $opt_mani $opt_lock $opt_jobs $opt_targets -L --crate-type --extern --message-format --profile --target --release --target-dir"
  @@ -140,7 +142,11 @@ _cargo()
  COMPREPLY=( $( compgen -W "$__cargo_commands" -- "$cur" ) )
  ;;
  *)
  + if [[ "$cmd" == "report" && "$prev" == future-incompat* ]]; then
  + local opt_var=opt__${cmd//-/_}__${prev//-/_}
  + else
  local opt_var=opt__${cmd//-/_}
  + fi
  if [[ -z "${!opt_var}" ]]; then
  # Fallback to filename completion.
  _filedir
  