TOC cuts long titles in middle for texi2pdf

[Christopher Dimech]

Have noticed that in the TOC, when a @subsection title
is long, the title is cut in the middle rather than
continuing a bit before the Page Number, then wrapping
the remaining words on the next line when using texi2pdf.

@subsection Easiest way to pass a Numeric Argument using Universal Prefix

texi2pdf file.texi

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1.5 Firing Commands with Arguments . . . . . . . . . . . . . . . . . . . . . . 
. . . . . . . . 9
1.5.1 Easiest way to pass a Numeric
Argument using Universal Prefix . . . . . . . . . . . . . . . . . . . . . . . . 
. . . . . . 10
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