docs: clarify VALUE option default syntax

Author: chhoumann

docs/docs/FormatSyntax.md

@@ -11,7 +11,7 @@ title: Format syntax
 | `{{VALUE}}` or `{{NAME}}`                  | Interchangeable. Represents the value given in an input prompt. If text is selected in the current editor, it will be used as the value. When using the QuickAdd API, this can be passed programmatically using the reserved variable name 'value'.                                                                                                                                             |
 | `{{VALUE:<variable name>}}`                  | You can now use variable names in values. They'll get saved and inserted just like values, but the difference is that you can have as many of them as you want. Use comma separation to get a suggester rather than a prompt.                                                       |
 | `{{VALUE:<variable name>\|label:<helper text>}}`     | Adds helper text to the prompt for a single-value input. The helper appears below the header and is useful for reminders or instructions. For multi-value lists, use the same syntax to label the suggester (e.g., `{{VALUE:Red,Green,Blue\|label:Pick a color}}`). |
-| `{{VALUE:<variable name>\|<default>}}`        | Same as above, but with a default value. For single-value prompts (e.g., `{{VALUE:name\|Anonymous}}`), the default is pre-populated in the input field - press Enter to accept or clear/edit it. For multi-value suggesters without `\|custom`, you must select one of the provided options (no default applies). If you combine options like `\|label:...`, use `\|default:<value>` instead of the shorthand. |
+| `{{VALUE:<variable name>\|<default>}}`        | Same as above, but with a default value. For single-value prompts (e.g., `{{VALUE:name\|Anonymous}}`), the default is pre-populated in the input field - press Enter to accept or clear/edit it. For multi-value suggesters without `\|custom`, you must select one of the provided options (no default applies). If you combine options like `\|label:...`, use `\|default:<value>` instead of the shorthand (mixing option keys with a bare default is not supported). |
 | `{{VALUE:<variable name>\|default:<value>}}`        | Option-form default value, required when combining with other options like `\|label:`. Example: `{{VALUE:title\|label:Snake case\|default:My_Title}}`. |
 | `{{VALUE:<options>\|custom}}`        | Allows you to type custom values in addition to selecting from the provided options. Example: `{{VALUE:Red,Green,Blue\|custom}}` will suggest Red, Green, and Blue, but also allows you to type any other value like "Purple". This is useful when you have common options but want flexibility for edge cases. **Note:** You cannot combine `\|custom` with a shorthand default value - use `\|default:` if you need both. |
 | `{{LINKCURRENT}}`                          | A link to the file from which the template or capture was triggered (`[[link]]` format). When the append-link setting is set to **Enabled (skip if no active file)**, this token resolves to an empty string instead of throwing an error if no note is focused. |