[glibc] manual: significand() uses FLT_RADIX, not 2

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=95c70fd0d467450e75354316453824693f07c3cc

commit 95c70fd0d467450e75354316453824693f07c3cc
Author: Alejandro Colomar <alx@kernel.org>
Date:   Sun Mar 31 22:38:52 2024 +0200

    manual: significand() uses FLT_RADIX, not 2
    
    It's implemented using scalb(), which uses FLT_RADIX, AFAIK.
    
    Link: <https://lore.kernel.org/linux-man/ZeYKUOKYS7G90SaV@debian/T/#mf21ab57e16b92eb6be6c7df79dc0eb43d4454056>
    Reported-by: Morten Welinder <mwelinder@gmail.com>
    Cc: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
    Cc: Vincent Lefevre <vincent@vinc17.net>
    Cc: DJ Delorie <dj@redhat.com>
    Cc: Paul Zimmermann <Paul.Zimmermann@inria.fr>
    Cc: Andreas Schwab <schwab@linux-m68k.org>
    Signed-off-by: Alejandro Colomar <alx@kernel.org>
    Reviewed-by: DJ Delorie <dj@redhat.com>

Diff:
---
 manual/arith.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/manual/arith.texi b/manual/arith.texi
index 0742c08ac4..034d9d2ba5 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -1395,7 +1395,7 @@ The @code{scalb} function is the BSD name for @code{ldexp}.
 @standards{BSD, math.h}
 @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
 @code{significand} returns the mantissa of @var{x} scaled to the range
-@math{[1, 2)}.
+@math{[1, @code{FLT_RADIX})}.
 It is equivalent to @w{@code{scalb (@var{x}, (double) -ilogb (@var{x}))}}.
 
 This function exists mainly for use in certain standardized tests