another loo_compare doc edit

Author: avehtari

R/loo_compare.R

@@ -58,12 +58,13 @@
 #'   (outliers). `elpd_diff` and `se_diff` are still indicative of the
 #'   differences and uncertainties, and for example, if `|elpd_diff|` is
 #'   many times larger than `se_diff` the difference is quite certain.
-#'   While `khat > 0.5` indicates possibility of outliers, it is also
-#'   possible that both models compared seem to be well specified based
+#'   The `khat` value for the `diag_diff` column is computed using
+#'   the pointwise elpd differences (and is different frin `khat`s in PSIS-LOO
+#'   diagnostic).  While `khat > 0.5` indicates possibility of outliers, it is
+#'   also possible that both models compared seem to be well specified based
 #'   on model checking, but the pointwise ELPD differences have such thick
 #'   tails that the normal approximation for the sum is not good (Vehtari et
-#'   al., 2024). Note that `khat`s in `diag_diff` column are different from
-#'   the `khat`s in PSIS-LOO  diagnostic. 
+#'   al., 2024).
 #'
 #'   The column `diag_elpd` shows diagnostic for the pointwise ELPD
 #'   computations for each model. If `k khat_psis > 0.7` is shown,