Add null to tonumber docs
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@ -14,7 +14,7 @@ Explicit type conversions are rarely necessary in Terraform because it will
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convert types automatically where required. Use the explicit type conversion
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functions only to normalize types returned in module outputs.
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Only numbers and strings containing decimal representations of numbers can be
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Only numbers, `null`, and strings containing decimal representations of numbers can be
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converted to number. All other values will produce an error.
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## Examples
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@ -24,6 +24,8 @@ converted to number. All other values will produce an error.
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1
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> tonumber("1")
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1
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> tonumber(null)
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null
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> tonumber("no")
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Error: Invalid function argument
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