[bug] Menu item accellerator/keybord-shortcut Some("Command++") does not work

[Simon-Laux]

Describe the bug

Menu item accellerator/keybord-shortcut Some("Command++") does not work and is not shown:

I suspect the usage of + as separator breaks this use case. Is there an alias that I don't know of that I can use here? if there is, then it should be mentioned in documentation.

Reproduction

&MenuItem::with_id(
   app,
    MenuId::new("zoom-in"),
    "Zoom In",
    true,
    if cfg!(target_os = "macos") {
        Some("Command++")
    } else {
        Some("Ctrl++")
    },
)?,
&MenuItem::with_id(
    app,
    MenuId::new("zoom-out"),
    "Zoom Out",
    true,
    if cfg!(target_os = "macos") {
        Some("Command+-")
    } else {
        Some("Ctrl+-")
    },
)?,

Expected behavior

Also a keyboard shortcut/accelerator for the zoom in option.

tauri info output

tauri: 2.3.1

rest is most likely not really relevant to this issue.

Additional context

An alternative for me could probably be to use a predefined menu item for zooming in/out - though they are not implemented yet:

• [bug] Tauri v2 is missing Zoom predefined menu item (MacOS) #11497
• More native menu items #2802