Update ch00python/010exemplar.ipynb

more accessible link to explanation of mercator projection

Co-authored-by: ageorgou <[email protected]>

ch00python/010exemplar.ipynb

@@ -249,7 +249,7 @@
     "We'll fetch a map of a place from the Google Maps server, given a longitude and latitude.\n",
     "The URLs look like: `https://mt0.google.com/vt?x=658&y=340&z=10&lyrs=s`.  \n",
     "Since we'll frequently be generating these URLs, we will create two helper functions to make our life easier.\n",
-    "The first is a function to convert our latitude & longitude into the coordinate system used by Google Maps. You can find details of the mathematics can be [here](https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#X_and_Y).\n",
+    "The first is a function to convert our latitude & longitude into the coordinate system used by Google Maps. If interested, you can see [more details of the mathematics](https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#X_and_Y).\n",
     "We will then create a second function to build up a web request from the URL given our parameters."
    ]
   },