DOC: Fix typos (#4314)

Author: yvonnefroehlich

examples/gallery/3d_plots/GALLERY_HEADER.rst

@@ -1,2 +1,2 @@
-3D Plots
---------
+3-D Plots
+---------

examples/gallery/basemaps/ternary.py

@@ -8,7 +8,7 @@
 at the positions listed in the first three columns of the sample dataset
 ``rock_compositions``, with default annotations and gridline spacings, using
 the specified labeling defined via ``alabel``, ``blabel``, and ``clabel``.
-Points are colored based on the values given in the fourth columns of the
+Points are colored based on the values given in the fourth column of the
 sample dataset via ``cmap=True``.
 """
 

examples/gallery/lines/vector_heads_tails.py

@@ -14,20 +14,19 @@
 arrow, and **I** for plain open tail. Further append **l** or **r** (e.g.
 ``"+bar"``) to only draw the left or right half-sides of the selected head/tail
 (default is both sides) or use **+l** or **+r** to apply simultaneously to both
-beginning and end. In this context left and right refer to the side of the
+beginning and end. In this context, left and right refer to the side of the
 vector line when viewed from the beginning point to the end point of a line
 segment. The angle of the vector head apex can be set using **+a**\ *angle*
 (default is 30). The shape of the vector head can be adjusted using
 **+h**\ *shape* (e.g. ``"+h0.5"``).
 
 For further modifiers see :gmt-docs:`plot.html#vector-attributes`.
 
-In the following we use the :meth:`pygmt.Figure.plot` method to plot vectors
+In the following, we use the :meth:`pygmt.Figure.plot` method to plot vectors
 with individual heads and tails. We must specify the modifiers (together with
 the vector type, here ``"v"`` for Cartesian vector, see also the
 :doc:`Vector types example </gallery/lines/vector_styles>`)
 by passing the corresponding shortcuts to the ``style`` parameter.
-
 """
 
 # %%

examples/gallery/symbols/custom_symbols.py

@@ -11,12 +11,12 @@
 For the remaining symbols see the GMT Technical Reference
 :gmt-docs:`reference/custom-symbols.html`.
 
-Beside these built-in custom symbols GMT allows users to define their own custom
+Besides these built-in custom symbols, GMT allows users to define their own custom
 symbols. For this, a specific macro language is used. A detailed introduction can
 be found at :gmt-docs:`reference/custom-symbols.html#the-macro-language`. After
 defining such a symbol it can be used in the same way as a built-in custom symbol.
 
-*Please note*: Custom symbols can not be used in auto-legends yet.
+*Please note*: Custom symbols cannot be used in auto-legends yet.
 """
 
 # %%

examples/tutorials/advanced/3d_perspective_image.py

@@ -76,8 +76,8 @@
 # The ``perspective`` azimuth can be changed to set the direction that is "up"
 # in the figure. The ``contour_pen`` parameter sets the pen used to draw contour
 # lines on the surface. :meth:`pygmt.Figure.colorbar` can be used to add a
-# color bar to the figure. The ``cmap`` parameter does not need to be passed
-# again. To keep the color bar's alignment similar to the figure, use ``True``
+# colorbar to the figure. The ``cmap`` parameter does not need to be passed
+# again. To keep the colorbar's alignment similar to the figure, use ``True``
 # as argument for the ``perspective`` parameter.
 
 fig = pygmt.Figure()

examples/tutorials/advanced/earth_relief.py

@@ -41,8 +41,8 @@
 
 
 # %%
-# Set a color map
-# ---------------
+# Set a colormap
+# --------------
 #
 # :meth:`pygmt.Figure.grdimage` takes the ``cmap`` parameter to set the CPT of the
 # figure. Examples of common CPTs for Earth relief are shown below. A full list of CPTs
@@ -64,8 +64,8 @@
 
 
 # %%
-# Add a color bar
-# ---------------
+# Add a colorbar
+# --------------
 #
 # The :meth:`pygmt.Figure.colorbar` method displays the CPT and the associated z-values
 # of the figure, and by default uses the same CPT set by the ``cmap`` parameter for