Update docstring in borders gallery example
@@ -11,9 +11,9 @@ below:
* **3** = Marine boundaries
* **a** = All boundaries (1-3)
-For example, to draw national boundaries with 1p thickness black lines use
-``borders="1/1p,black"``. You can draw multiple boundaries by passing in a list to
-``borders``.
+For example, to draw national boundaries with a line thickness of 1p and black line
+color use ``borders="1/1p,black"``. You can draw multiple boundaries by passing in
+a list to ``borders``.
"""
import pygmt
