[rea01]
A <div> may be referred to in a <realign> no more than once (whether <anchor-div-ref> or <div-ref>).
<div>
<realign>
<anchor-div-ref>
<div-ref>
Affects: <anchor-div-ref> <div-ref> <realign>
Used by template ŧ TAN-A-div-errors
ŧ TAN-A-div-errors