Simplify presentation of ability difference

app.py

@@ -147,7 +147,7 @@ class ComparisonPlotter(DataPlotter):
         ax = sns.histplot(data=self.df,
                           stat='density',
                           color=c_hist)
-        ax.set_xlabel('logit$^{-1}$(\u03B1$_{1}$ - \u03B1$_{2}$)')
+        ax.set_xlabel('\u03B1$_{1}$ - \u03B1$_{2}$')
 
         self.pr(ax, hdi, c_hdi)
         self.min_inclusive(ax)
@@ -272,8 +272,8 @@ def layout(tab):
                 gr.Markdown(f'''
 
                 Probability that Model 1 is preferred to Model 2. The
-                histogram is represents the distribution of inverse
-                logit of the difference in model abilities. The dashed
+                histogram is represents the distribution of the
+                difference in estimated model abilities. The dashed
                 vertical line is its median. The shaded region
                 demarcates the chosen [highest density
                 interval](https://cran.r-project.org/package=HDInterval)