Commits on Aug 5, 2023

1. Fix inverse_discrete_quantile for large guess …

   If `guess` passed to `inverse_discrete_quantile` cannot be represented
   as floating point number, it is possible that `guess + 1` or `guess - 1`
   does not change the value at all and we are stuck in infinite loop
   inside `round_to_floor` or `round_to_ceil`.  Fix this by
   increase/decrease more than 1 in these cases.
   
   Example code to reproduce this:
   ```c++
   boost::math::binomial_distribution<> dist(9079765771874083840, 0.561815);
   boost::math::quantile(dist, 0.0365346);
   ```

   

   Yuhta committed Aug 5, 2023
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