Amend documentation for aesthtics

Use Unicode Character “＿” (U+FF3F) to maintain the effect in tutorial:basics

Author: Jacobluke-

nbs/tutorials/01-basics.ipynb

@@ -408,12 +408,14 @@
    "source": [
     "The **dabest** library now features a range of effect sizes:\n",
     "\n",
-    "  - the mean difference (``mean_diff``)\n",
-    "  - the median difference (``median_diff``)\n",
-    "  - [Cohen's d](https://en.wikipedia.org/wiki/Effect_size#Cohen's_d) (``cohens_d``)\n",
-    "  - [Hedges' g](https://en.wikipedia.org/wiki/Effect_size#Hedges'_g) (``hedges_g``)\n",
-    "  - [Cliff's delta](https://en.wikipedia.org/wiki/Effect_size#Effect_size_for_ordinal_data)(``cliffs_delta``)\n",
+    "  - the mean difference (`mean＿diff`)\n",
+    "  - the median difference (`median＿diff`)\n",
+    "  - [Cohen's d](https://en.wikipedia.org/wiki/Effect_size#Cohen's_d) (`cohens＿d`)\n",
+    "  - [Hedges' g](https://en.wikipedia.org/wiki/Effect_size#Hedges'_g) (`hedges＿g`)\n",
+    "  - [Cohen's h](https://en.wikipedia.org/wiki/Cohen's_h) (`cohens＿h`)\n",
+    "  - [Cliff's delta](https://en.wikipedia.org/wiki/Effect_size#Effect_size_for_ordinal_data) (`cliffs＿delta`)\n",
     "  \n",
+    "[comment]: <> (Please copy this underline for the above ＿)\n",
     " \n",
     "Each of these are attributes of the ``Dabest`` object."
    ]