Tiny improvements for the inset gallery example (#1051)

Co-authored-by: Michael Grund <[email protected]>

Author: core-man

examples/gallery/embellishments/inset.py

@@ -4,8 +4,8 @@
 
 The :meth:`pygmt.Figure.inset` method adds an inset figure inside a larger
 figure. The function is called using a ``with`` statement, and its position,
-box, offset, and margin parameters are set. Within the ``with`` statement,
-PyGMT plotting functions can be called that add to the inset figure.
+box, offset, and margin parameters are set. Plotting methods called within the
+``with`` statement are applied to the inset figure.
 """
 import pygmt