Update an accounting code rule

Assembles a formatted accounting code for the journal entry report: each segment resolves to a value, is wrapped and transformed, and the results are concatenated in order. Only valid on rules with no tag and no tag group; null when unset.

Assembles a formatted accounting code for the journal entry report: each segment resolves to a value, is wrapped and transformed, and the results are concatenated in order. Only valid on rules with no tag and no tag group; null when unset.