[libc][NFC] Rename `MANTISSA_WIDTH` in `FRACTION_LEN` (#75489)

This one might be a bit controversial since the terminology has been
introduced from the start but I think `FRACTION_LEN` is a better name
here. AFAICT it really is "the number of bits after the decimal dot when
the number is in normal form."

`MANTISSA_WIDTH` is less precise as it's unclear whether we take the
leading bit into account.
This patch also renames most of the properties to use the `_LEN` suffix
and fixes useless casts or variables.

1 files changed, 1 insertions, 1 deletions

diff --git a/libc/fuzzing/stdlib/strtofloat_fuzz.cpp b/libc/fuzzing/stdlib/strtofloat_fuzz.cpp
index f6cc8abedf46..ea2f492f57ae 100644
--- a/libc/fuzzing/stdlib/strtofloat_fuzz.cpp
+++ b/libc/fuzzing/stdlib/strtofloat_fuzz.cpp
@@ -33,7 +33,7 @@ template <typename F> inline constexpr int effective_precision(int exponent) {
   // This is intended to be 0 when the exponent is the lowest normal and
   // increase as the exponent's magnitude increases.
   const int bits_below_normal =
-      (-exponent) - (FloatProperties<F>::EXPONENT_BIAS - 1);
+      (-exponent) - (FloatProperties<F>::EXP_BIAS - 1);
 
   // The precision should be the normal, full precision, minus the bits lost
   // by this being a subnormal, minus one for the implicit leading one.