Backport PR matplotlib#31721: Improve some example titles.

Author: timhoffm

galleries/examples/ticks/colorbar_tick_labelling_demo.py

@@ -1,6 +1,6 @@
 """
 =======================
-Colorbar Tick Labelling
+Colorbar Tick labelling
 =======================
 
 Vertical colorbars have ticks, tick labels, and labels visible on the *y* axis,

galleries/examples/ticks/date_demo_convert.py

@@ -1,9 +1,9 @@
 """
-=================
-Date Demo Convert
-=================
-
+===================
+Date converter demo
+===================
 """
+
 import datetime
 
 import matplotlib.pyplot as plt
@@ -21,14 +21,13 @@
 fig, ax = plt.subplots()
 ax.plot(dates, y**2, 'o')
 
-# this is superfluous, since the autoscaler should get it right, but
+# This is superfluous, since the autoscaler should get it right, but
 # use date2num and num2date to convert between dates and floats if
-# you want; both date2num and num2date convert an instance or sequence
+# you want; both date2num and num2date convert an instance or sequence.
 ax.set_xlim(dates[0], dates[-1])
 
 # The hour locator takes the hour or sequence of hours you want to
-# tick, not the base multiple
-
+# tick, not the base multiple.
 ax.xaxis.set_major_locator(DayLocator())
 ax.xaxis.set_minor_locator(HourLocator(range(0, 25, 6)))
 ax.xaxis.set_major_formatter(DateFormatter('%Y-%m-%d'))

galleries/examples/ticks/fig_axes_customize_simple.py

@@ -1,7 +1,7 @@
 """
-=========================
-Fig Axes Customize Simple
-=========================
+======================================
+Customizing figure and axes appearance
+======================================
 
 Customize the background, labels and ticks of a simple plot.