Update examples/projections/azim/azim_equidistant.py

Co-authored-by: Dongdong Tian <seisman.info@gmail.com>

Author: willschlitzer

examples/projections/azim/azim_equidistant.py

@@ -8,7 +8,7 @@
 that lie within a certain distance or for comparing distances of different
 locations relative to the projection center.
 
-**e**\ *lon0/at0*\ [*/horizon*]\ */scale* or
+**e**\ *lon0/lat0*\ [*/horizon*]\ */scale* or
 **E**\ *lon0/lat0*\ [*/horizon*]\ */width*
 
 The projection type is set with **e** or **E**, *lon0/lat0* specifies the projection