Fix errors discovered by CI

Author: deep-jkl

doc/users/next_whats_new/extending_MarkerStyle.rst

@@ -6,7 +6,8 @@ The appearance of individual markers can be further controlled by
 transform supplied during creation.
 
 .. plot::
-    :include-source:
+    :include-source: true
+    
     import matplotlib.pyplot as plt
     from matplotlib.markers import MarkerStyle
     from matplotlib.transforms import Affine2D

examples/lines_bars_and_markers/marker_reference.py

@@ -171,7 +171,7 @@ def split_list(a_list):
 # selected marker shape (e.g. caret up, caret down). Following example shows
 # how user supplied rotation applies to several marker shapes.
 
-common_style = {k: v for k, v in filled_marker_style.items() if v != 'marker'}
+common_style = {k: v for k, v in filled_marker_style.items() if k != 'marker'}
 angles = [0, 10, 20, 30, 45, 60, 90]
 
 fig, ax = plt.subplots()
@@ -227,7 +227,7 @@ def split_list(a_list):
 fig.suptitle('Marker CapStyle', fontsize=14)
 fig.subplots_adjust(left=0.1)
 
-for y, cap_style in enumerate([None, *CapStyle]):
+for y, cap_style in enumerate(CapStyle):
     ax.text(-0.5, y, cap_style.name, **text_style)
     for x, theta in enumerate(angles):
         t = Affine2D().rotate_deg(theta)
@@ -240,7 +240,7 @@ def split_list(a_list):
 
 ###############################################################################
 # Follwing example show how to change the join style and how different styles
-# look.
+# looks like.
 
 fig, ax = plt.subplots()
 fig.suptitle('Marker JoinStyle', fontsize=14)

examples/lines_bars_and_markers/multivariate_marker_plot.py

@@ -18,9 +18,9 @@
 from matplotlib.colors import Normalize
 
 SUCCESS_SYMBOLS = [
-    TextPath((0,0), "☹"), 
-    TextPath((0,0), "😒"), 
-    TextPath((0,0), "☺"), 
+    TextPath((0, 0), "☹"),
+    TextPath((0, 0), "😒"),
+    TextPath((0, 0), "☺"),
 ]
 
 N = 25
@@ -40,6 +40,6 @@
     m = MarkerStyle(SUCCESS_SYMBOLS[mood], transform=t)
     ax.plot(pos[0], pos[1], marker=m, color=cmap(thrust))
 fig.colorbar(plt.cm.ScalarMappable(norm=Normalize(0, 1), cmap=cmap),
-    ax=ax, label="Normalized Thrust [a.u.]")
+             ax=ax, label="Normalized Thrust [a.u.]")
 ax.set_xlabel("X position [m]")
 ax.set_ylabel("Y position [m]")