Update marker-style.md

Author: LiamConnors

doc/python/marker-style.md

@@ -370,11 +370,10 @@ import plotly.express as px
 df = px.data.iris()
 fig = px.scatter(df, x="sepal_width", y="sepal_length", color="species")
 
-fig.update_traces(marker=dict(size=8,
-                              symbol='diamond',
-                              line=dict(width=2,
-                                        color='DarkSlateGrey')),
-                  selector=dict(mode='markers'))
+fig.update_traces(
+    marker=dict(size=8, symbol="diamond", line=dict(width=2, color="DarkSlateGrey")),
+    selector=dict(mode="markers"),
+)
 fig.show()
 
 ```
@@ -392,12 +391,12 @@ import plotly.express as px
 df = px.data.iris()
 fig = px.scatter(df, x="sepal_width", y="sepal_length", color="species")
 
-fig.update_traces(marker=dict(size=12,
-                              symbol='arrow',
-                              angle=45,
-                              line=dict(width=2,
-                                        color='DarkSlateGrey')),
-                  selector=dict(mode='markers'))
+fig.update_traces(
+    marker=dict(
+        size=12, symbol="arrow", angle=45, line=dict(width=2, color="DarkSlateGrey")
+    ),
+    selector=dict(mode="markers"),
+)
 fig.show()
 
 ```