Updating doc string for cyl_equidistant.py

examples/projections/cyl/cyl_equidistant.py

@@ -6,7 +6,10 @@
 latitudes. The most common form is the Plate Carrée projection, where the scaling of
 longitudes and latitudes is the same. All meridians and parallels are straight lines.
 
-``Qwidth``: Give the figure ``width``.
+**q**\ */scale* or **Q**\ */width*
+
+The projection is set with **q** or **Q**, and the figure size is set
+with *scale* or *width*.
 """
 import pygmt