[texhax] The Em Rule, a Question of Style

Philip TAYLOR P.Taylor at Rhul.Ac.Uk
Tue May 18 15:40:19 CEST 2010

Philip G. Ratcliffe wrote:

> Many, if not most, style guides suggest that there should be NO space
> surro[u]nding the em dash.

The Oxford Guide to Style says (in part)

"Use [the em-rule] spaced to indicate the omission of a word,
  and closed up to indicate the omission of part of a word"

"Use the em-rule closed up in a written dialogue to indicate
  an interruption"

"Use the spaced em-rule in dictionaries and indices to indicate
  a repeated head word or part of a definition"

"Use the spaced 2-em rule for a repeated author's name in
  successive bibliographic entries"

Philip Taylor

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