Auto merge of #10295 - ehuss:bash-report, r=alexcrichton

Add report subcommand to bash completion.

This adds the `cargo report` subcommand to the bash completion.

src/etc/cargo.bashcomp.sh

@@ -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" -- "$cur" ) )
 				;;
 			*)
-				local opt_var=opt__${cmd//-/_}
+				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