Clean up docstring in azim_gnomonic.py

examples/projections/azim/azim_gnomonic.py

@@ -1,4 +1,4 @@
-"""
+r"""
 Gnomonic
 ========
 
@@ -10,10 +10,12 @@
 that the scope of application is restricted to a small area around the
 projection center (at a maximum of 60°).
 
-``flon0/lat0[/horizon]/scale`` or ``Flon0/lat0[/horizon]/width``
+**f**\ *lon0/lat0*\ [*/horizon*\ ]\ */scale*
+or **F**\ *lon0/lat0*\ [*/horizon*\ ]\ */width*
 
-``lon0/lat0`` specify the projection center, the optional parameter ``horizon``
-specifies the max distance from projection center (in degrees, < 90, default 60).
+*lon0/lat0* specify the projection center, the optional parameter *horizon*
+specifies the max distance from projection center (in degrees, < 90, default 60), and
+*scale* or *width* sets the size of the figure..
 """
 import pygmt