Apply suggestions from code review

Co-authored-by: Wei Ji <23487320+weiji14@users.noreply.github.com>

Author: noorbuchi

examples/tutorials/date_time_charts.py

@@ -288,8 +288,8 @@
 # it sets the main annotation and major tick spacing interval
 # to one month (**a1O**) (capital letter o, not zero). Additionally,
 # it sets the minor tick spacing interval to 1 day (**f1D**).
-# The labeling of this axis is also modified using
-# ``pygmt.config(FORMAT_DATE_MAP="o")`` to use the month's
+# The labeling of this axis can be modified by setting
+# :gmt-term:`FORMAT_DATE_MAP` to 'o' to use the month's
 # name instead of its number.
 
 x = pd.date_range("2013-05-02", periods=10, freq="2D")
@@ -319,8 +319,8 @@
 # the day of the week.
 #
 # Another notable mention in this example is
-# ``pygmt.config(FORMAT_CLOCK_MAP="-hhAM")``
-# which specifies the used format for time.
+# setting :gmt-term:`FORMAT_CLOCK_MAP` to "-hhAM"
+# which specifies the format used for time.
 # In this case, leading zeros are removed
 # using **(-)**, and only hours are displayed.
 # Additionally, an AM/PM system is being used