Quote:
Originally Posted by roger64
It must have an unfavourable impact over the vertical positioning of the note anchor. It would seem logical to replace the bracket by a dash so as not to perturb it but this would have to face established usage... Well...
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The bracket suggestion is
instead of superscripting, and it's also common in plain-text contexts. In any case, adding brackets should not change at all the line spacing, if the brackets have the same size/position/etc. as the number. From the point of view of the line spacing, it doesn't matter which characters you have, they're just boxes with something drawn inside (or sometimes outside). What
could happen is that a bracket clashes with the line above/below where another character wouldn't, but this shouldn't be the case in normal circumstances.