[bug #63354] Refine fallbacks.tmac

[Bjarni Ingi Gislason]

Follow-up Comment #26, bug #63354 (project groff):

  About the character "figure dash".

  The total width of a figure dash must be the same as that of a digit,
so (including "air")

.if !c \[u2012] \{\
.  nr lfiguredash \w'0'u-(2*\w'\^'u)
.  char \[u2012] \^\v'-0.3m'\D'l \n[lfiguredash]u 0m'\v'0.3m\^'
.  rm lfiguredash
.\}

  And with a synonym (PostScript name)

.tr \[figuredash]\[u2012]



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