Use kebab case for multi-word commands

But keep snake case as hidden alternatives so as not to break anything.

toot/cli/accounts.py

@@ -1,6 +1,7 @@
 import click
 import json as pyjson
 
+from copy import copy
 from typing import BinaryIO, Optional
 
 from toot import api
@@ -9,7 +10,7 @@ from toot.cli.validators import validate_language
 from toot.output import print_acct_list
 
 
-@cli.command(name="update_account")
+@cli.command()
 @click.option("--display-name", help="The display name to use for the profile.")
 @click.option("--note", help="The account bio.")
 @click.option(
@@ -106,6 +107,12 @@ def update_account(
         click.secho("✓ Account updated", fg="green")
 
 
+# Make alias in snake case to keep BC
+update_account_alias = copy(update_account)
+update_account_alias.hidden = True
+cli.add_command(update_account_alias, name="update_account")
+
+
 @cli.command()
 @click.argument("account")
 @json_option

toot/cli/statuses.py

@@ -1,3 +1,4 @@
+from copy import copy
 import click
 
 from toot import api
@@ -129,7 +130,7 @@ def unbookmark(ctx: Context, status_id: str, json: bool):
         click.secho("✓ Status unbookmarked", fg="green")
 
 
-@cli.command(name="reblogged_by")
+@cli.command()
 @click.argument("status_id")
 @json_option
 @pass_context
@@ -146,3 +147,9 @@ def reblogged_by(ctx: Context, status_id: str, json: bool):
             print_table(headers, rows)
         else:
             click.echo("This status is not reblogged by anyone")
+
+
+# Make alias in snake case to keep BC
+reblogged_by_alias = copy(reblogged_by)
+reblogged_by_alias.hidden = True
+cli.add_command(reblogged_by_alias, name="reblogged_by")