proper 'new in' version numbers

Author: nicolaskruchten

doc/python/annotated-heatmap.md

@@ -43,6 +43,8 @@ As of version 5.5.0 of `plotly`, the **recommended way to [display annotated hea
 
 #### Basic Annotated Heatmap for z-annotations
 
+*New in v5.5*
+
 After creating a figure with `px.imshow`, you can add z-annotations with `.update_traces(texttemplate="%{z}")`.
 
 ```python
@@ -246,7 +248,7 @@ fig = px.imshow(color, color_continuous_scale=colorscale, aspect="auto",
                title='Periodic Table')
 fig.update_traces(
     text=symbol, texttemplate="%{text}", textfont_size=12,
-    customdata=np.moveaxis([element, atomic_mass], 0,-1), 
+    customdata=np.moveaxis([element, atomic_mass], 0,-1),
     hovertemplate="%{customdata[0]}<br>Atomic Mass: %{customdata[1]:.2f}<extra></extra>"
 )
 fig.update_xaxes(visible=False)

doc/python/axes.md

@@ -293,6 +293,8 @@ fig.show()
 
 ##### Step for tick labels
 
+*New in v5.6*
+
 You can set a step for tick labels with `ticklabelstep`. In this example, we hide labels between every `2` ticks on the y axes. Similarly, this can be used with `fig.update_xaxes` for x axes: `fig.update_xaxes(ticklabelstep=2)`.
 
 ```python

doc/python/filled-area-plots.md

@@ -63,7 +63,7 @@ IFrame(snippet_url + 'filled-area-plots', width='100%', height=1200)
 
 ### Pattern Fills
 
-*New in v5.0*
+*New in v5.7*
 
 Area charts afford the use of [patterns (also known as hatching or texture)](/python/pattern-hatching-texture/) in addition to color:
 

doc/python/legend.md

@@ -99,7 +99,7 @@ fig.show()
 
 *New in v5.0*
 
-The `legendrank` attribute of a trace can be used to control its placement within the legend, without regard for its placement in the `data` list. 
+The `legendrank` attribute of a trace can be used to control its placement within the legend, without regard for its placement in the `data` list.
 
 The default `legendrank` for traces is 1000 and ties are broken as described above, meaning that any trace can be pulled up to the top if it is the only one with a legend rank less than 1000 and pushed to the bottom if it is the only one with a rank greater than 1000.
 
@@ -447,6 +447,8 @@ fig.show()
 
 #### Group click toggle behavior
 
+*New in v5.3*
+
 You can also define the toggle behavior for when a user clicks an item in a group. Here we set the `groupclick` for the `legend` to `toggleitem`. This toggles the visibility of just the item clicked on by the user. Set to `togglegroup` and it toggles the visibility of all items in the same group as the item clicked on.
 
 ```python

doc/python/smith-charts.md

@@ -33,6 +33,8 @@ jupyter:
     thumbnail: thumbnail/contourcarpet.jpg
 ---
 
+*New in v5.4*
+
 A [Smith Chart](https://en.wikipedia.org/wiki/Smith_chart) is a specialized chart for visualizing [complex numbers](https://en.wikipedia.org/wiki/Complex_number): numbers with both a real and imaginary part.
 
 
@@ -53,7 +55,7 @@ import plotly.graph_objects as go
 fig = go.Figure()
 
 fig.add_trace(go.Scattersmith(
-    imag=[1], 
+    imag=[1],
     real=[1],
     marker_symbol='x',
     marker_size=30,
@@ -62,7 +64,7 @@ fig.add_trace(go.Scattersmith(
 ))
 
 fig.add_trace(go.Scattersmith(
-    imag=[1], 
+    imag=[1],
     real=[1],
     marker_symbol='x',
     marker_size=30,