Use no underscore

Author: yvonnefroehlich

examples/gallery/images/cross_section.py

@@ -75,7 +75,7 @@
 fig.shift_origin(yshift="h+1.5c")
 
 fig.basemap(
-    region=[0, 15, -8000, 6000],  # x_min, x_max, y_min, y_max
+    region=[0, 15, -8000, 6000],  # xmin, xmax, ymin, ymax
     # Cartesian projection with a width of 12 centimeters and a height of 3 centimeters
     projection="X12c/3c",
     frame=0,

examples/projections/nongeo/cartesian_linear.py

@@ -21,7 +21,7 @@
 import pygmt
 
 fig = pygmt.Figure()
-# The region parameter is specified as x_min, x_max, y_min, y_max
+# The region parameter is specified as xmin, xmax, ymin, ymax
 fig.basemap(region=[0, 10, 0, 50], projection="X15c/10c", frame=["afg", "+gbisque"])
 fig.plot(x=[3, 9, 2], y=[4, 9, 37], pen="2p,black")
 # Plot data points on top of the line