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(texinfo)- and hyphenation

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`@-' and `@hyphenation': Helping TeX hyphenate
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  Although TeX's hyphenation algorithm is generally pretty good, it
does miss useful hyphenation points from time to time.  (Or, far more
rarely, insert an incorrect hyphenation.)  So, for documents with an
unusual vocabulary or when fine-tuning for a printed edition, you may
wish to help TeX out.  Texinfo supports two commands for this:

`@-'
     Insert a discretionary hyphen, i.e., a place where TeX can (but
     does not have to) hyphenate.  This is especially useful when you
     notice an overfull hbox is due to TeX missing a hyphenation (Note:
     Overfull hboxes).  TeX will not insert any hyphenation points in
     a word containing `@-'.

`@hyphenation{HY-PHEN-A-TED WORDS}'
     Tell TeX how to hyphenate HY-PHEN-A-TED WORDS.  As shown, you put
     a `-' at each hyphenation point.  For example:
          @hyphenation{man-u-script man-u-scripts}
      TeX only uses the specified hyphenation points when the words
     match exactly, so give all necessary variants.

  Info output is not hyphenated, so these commands have no effect there.