doc: fix superscript in Texinfo manual's math

The numeral "3" in the exponent was set at full size on the baseline.

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index ec58f6cf2a65dd947968b105212624f2d94206c2..45f4c800261b56a051e6ee40805b2f93df5664d2 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -1560,7 +1560,7 @@ case-insensitive @code{inf}, @code{infinity}, and @code{NaN}, although
 whether such values are useful depends on the command in question.
 Modern C implementations also accept hexadecimal floating point
 numbers such as @code{-0x.ep-3}, which stands for @minus{}14/16 times
-@math{2^-3}, which equals @minus{}0.109375.  @xref{Parsing of
+@math{2^{-3}}, which equals @minus{}0.109375.  @xref{Parsing of
 Floats,,, libc, The GNU C Library Reference Manual}.
 
 @vindex LC_NUMERIC