Usage

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Add this message box to a template's documentation to briefly explain the rules of substitution for the template.

Parameters

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The first parameter inserts a word between "should" and "be", e.g. "always", "never" etc. To have no word instead, insert a space.

The second parameter is optional. It adds text to the end of the sentence.

Example

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{{Substitution|only|if...}}

produces: