fix internal reference links

Author: nicolaskruchten

doc/python/2D-Histogram.md

@@ -137,7 +137,7 @@ fig = go.Figure(go.Histogram2d(x=x, y=y, histnorm='probability',
 fig.show()
 ```
 ### Sharing bin settings between 2D Histograms
-This example shows how to use [bingroup](https://plotly.com/python/reference/#histogram-bingroup) attribute to have a compatible bin settings for both histograms. To define `start`, `end` and `size` value of x-axis and y-axis seperatly, set [ybins](https://plotly.com/python/reference/#histogram2dcontour-ybins) and `xbins`.
+This example shows how to use [bingroup](https://plotly.com/python/reference/histogram/#histogram-bingroup) attribute to have a compatible bin settings for both histograms. To define `start`, `end` and `size` value of x-axis and y-axis seperatly, set [ybins](https://plotly.com/python/reference/histogram2dcontour/#histogram2dcontour-ybins) and `xbins`.
 
 ```python
 import plotly.graph_objects as go
@@ -236,4 +236,4 @@ fig.show()
 ```
 
 #### Reference
-See https://plotly.com/python/reference/#histogram2d for more information and chart attribute options!
+See https://plotly.com/python/reference/histogram2d/ for more information and chart attribute options!

doc/python/2d-histogram-contour.md

@@ -249,4 +249,4 @@ fig.show()
 ```
 
 #### Reference
-See https://plotly.com/python/reference/#histogram2dcontour for more information and chart attribute options!
+See https://plotly.com/python/reference/histogram2dcontour/ for more information and chart attribute options!

doc/python/3d-bubble-charts.md

@@ -107,7 +107,7 @@ fig = go.Figure(data=go.Scatter3d(
     mode = 'markers',
     marker = dict(
         sizemode = 'diameter',
-        sizeref = 750, # info on sizeref: https://plotly.com/python/reference/#scatter-marker-sizeref
+        sizeref = 750, # info on sizeref: https://plotly.com/python/reference/scatter/#scatter-marker-sizeref
         size = planet_diameter,
         color = planet_colors,
         )
@@ -146,7 +146,7 @@ fig = go.Figure(go.Scatter3d(
     mode = 'markers',
     marker = dict(
         sizemode = 'diameter',
-        sizeref = 750, # info on sizeref: https://plotly.com/python/reference/#scatter-marker-sizeref
+        sizeref = 750, # info on sizeref: https://plotly.com/python/reference/scatter/#scatter-marker-sizeref
         size = planet_diameter,
         color = temperatures,
         colorbar_title = 'Mean<br>Temperature',
@@ -166,4 +166,4 @@ fig.show()
 
 #### Reference
 
-See https://plotly.com/python/reference/#scatter3d and https://plotly.com/python/reference/#scatter-marker-sizeref <br>for more information and chart attribute options!
+See https://plotly.com/python/reference/scatter3d/ and https://plotly.com/python/reference/scatter/#scatter-marker-sizeref <br>for more information and chart attribute options!

doc/python/3d-camera-controls.md

@@ -290,4 +290,4 @@ fig.show()
 #### Reference
 
 
-See https://plotly.com/python/reference/#layout-scene-camera for more information and chart attribute options!
+See https://plotly.com/python/reference/layout/scene/#layout-scene-camera for more information and chart attribute options!

doc/python/3d-isosurface-plots.md

@@ -235,4 +235,4 @@ fig.show()
 ```
 
 #### Reference
-See https://plotly.com/python/reference/#isosurface for more information and chart attribute options!
+See https://plotly.com/python/reference/isosurface/ for more information and chart attribute options!

doc/python/3d-line-plots.md

@@ -120,4 +120,4 @@ fig.show()
 
 #### Reference
 
-See https://plotly.com/python/reference/#scatter3d-marker-line for more information and chart attribute options!
+See https://plotly.com/python/reference/scatter3d/#scatter3d-marker-line for more information and chart attribute options!

doc/python/3d-mesh.md

@@ -163,4 +163,4 @@ fig.show()
 ```
 
 ## Reference
-See https://plotly.com/python/reference/#mesh3d for more information and chart attribute options!
+See https://plotly.com/python/reference/mesh3d/ for more information and chart attribute options!

doc/python/3d-scatter-plots.md

@@ -122,4 +122,4 @@ fig.show()
 
 #### Reference
 
-See https://plotly.com/python/reference/#scatter3d for more information and chart attribute options!
+See https://plotly.com/python/reference/scatter3d/ for more information and chart attribute options!

doc/python/3d-surface-plots.md

@@ -77,7 +77,7 @@ fig.show()
 #### Surface Plot With Contours
 
 
-Display and customize contour data for each axis using the `contours` attribute ([reference](plotly.com/python/reference/#surface-contours)).
+Display and customize contour data for each axis using the `contours` attribute ([reference](plotly.com/python/reference/surface/#surface-contours)).
 
 ```python
 import plotly.graph_objects as go
@@ -99,7 +99,7 @@ fig.update_layout(title='Mt Bruno Elevation', autosize=False,
 fig.show()
 ```
 #### Configure Surface Contour Levels
-This example shows how to slice the surface graph on the desired position for each of x, y and z axis. [contours.x.start](https://plotly.com/python/reference/#surface-contours-x-start) sets the starting contour level value, `end` sets the end of it, and `size` sets the step between each contour level.
+This example shows how to slice the surface graph on the desired position for each of x, y and z axis. [contours.x.start](https://plotly.com/python/reference/surface/#surface-contours-x-start) sets the starting contour level value, `end` sets the end of it, and `size` sets the step between each contour level.
 
 ```python
 import plotly.graph_objects as go
@@ -196,4 +196,4 @@ fig.show()
 #### Reference
 
 
-See https://plotly.com/python/reference/#surface for more information!
+See https://plotly.com/python/reference/surface/ for more information!

doc/python/3d-volume.md

@@ -254,7 +254,7 @@ fig.show()
 ```
 
 #### Reference
-See https://plotly.com/python/reference/#volume for more information and chart attribute options!
+See https://plotly.com/python/reference/volume/ for more information and chart attribute options!
 
 #### See also
 [3D isosurface documentation](/python/3d-isosurface-plots/)