Fix tiny typo in syntax in documentation of `pygmt.Figure.meca`
@@ -204,7 +204,7 @@ def meca(
``event_name`` values in ``spec`` if ``spec`` is a dict or
pd.DataFrame.
offset: bool or str
- [**+p**\ *pen*][**+s**\ *size].
+ [**+p**\ *pen*][**+s**\ *size*].
Offsets beachballs to the longitude, latitude specified in the last two
columns of the input file or array, or by ``plot_longitude`` and
``plot_latitude`` if provided. A small circle is plotted at the initial
