Prefer `/reopen` over `/open`, remove `/reassign`

app/services/slash_commands/interpret_service.rb

@@ -53,7 +53,7 @@ module SlashCommands
       noteable.closed? &&
         current_user.can?(:"update_#{noteable.to_ability_name}", noteable)
     end
-    command :open, :reopen do
+    command :reopen, :open do
       @updates[:state_event] = 'reopen'
     end
 
@@ -72,7 +72,7 @@ module SlashCommands
     condition do
       current_user.can?(:"admin_#{noteable.to_ability_name}", project)
     end
-    command :assign, :reassign do |assignee_param|
+    command :assign do |assignee_param|
       user = extract_references(assignee_param, :user).first
       user ||= User.find_by(username: assignee_param)
       user ||= User.find_by(name: assignee_param)
@@ -180,7 +180,7 @@ module SlashCommands
     end
 
     desc 'Set due date'
-    params '<in 2 days | this Friday | December 31st>'
+    params '<in 2 days; this Friday; December 31st>'
     condition do
       noteable.respond_to?(:due_date) &&
         current_user.can?(:"update_#{noteable.to_ability_name}", noteable)
@@ -204,7 +204,7 @@ module SlashCommands
     # This is a dummy command, so that it appears in the autocomplete commands
     desc 'CC'
     params '@user'
-    command :cc, noop: true
+    command :cc
 
     def find_label_ids(labels_param)
       label_ids_by_reference = extract_references(labels_param, :label).map(&:id)

doc/workflow/slash_commands.md

@@ -12,9 +12,9 @@ do.
 | Command                    | Aliases             | Action       |
 |:---------------------------|:--------------------|:-------------|
 | `/close`                   | None                | Close the issue or merge request |
-| `/open`                    | `/reopen`           | Reopen the issue or merge request |
+| `/reopen`                  | `/open`             | Reopen the issue or merge request |
 | `/title <New title>`       | None                | Change title |
-| `/assign @username`        | `/reassign`         | Assign |
+| `/assign @username`        | None                | Assign |
 | `/unassign`                | `/remove_assignee`  | Remove assignee |
 | `/milestone %milestone`    | None                | Set milestone |
 | `/clear_milestone`         | `/remove_milestone` | Remove milestone |
@@ -25,5 +25,5 @@ do.
 | `/done`                    | None                | Mark todo as done |
 | `/subscribe`               | None                | Subscribe |
 | `/unsubscribe`             | None                | Unsubscribe |
-| `/due <in 2 days | this Friday | December 31st>` | `/due_date` | Set due date |
+| `/due <in 2 days; this Friday; December 31st>` | `/due_date` | Set due date |
 | `/clear_due_date`          | None                | Remove due date |