Type the correctly rounded value or the -1/e constant into the source…

… code. It results in the same final value, but now the user can see what it's supposed to be if they read the code

src/lib.rs

@@ -96,7 +96,7 @@ mod swm1f;
 /// The negative inverse of e (-1/e).
 ///
 /// This is the smallest input value for which the Lambert W functions in this crate return a value.
-pub const NEG_INV_E: f64 = -0.367_879_441_171_442_33;
+pub const NEG_INV_E: f64 = -0.367_879_441_171_442_32;
 
 /// 1/sqrt(e)
 const INV_SQRT_E: f64 = 0.606_530_659_712_633_4;