Merge pull request #3813 from adamjhawley/hover-docs-typo

Fix typo in 'hover-text-and-formatting.md'

Author: nicolaskruchten

Diff for: doc/python/hover-text-and-formatting.md

@@ -183,7 +183,7 @@ fig.show()
 
 ### Customizing hover text with a hovertemplate
 
-To customize the tooltip on your graph you can use the [hovertemplate](https://plotly.com/python/reference/pie/#pie-hovertemplate) attribute of `graph_objects` tracces, which is a template string used for rendering the information that appear on hoverbox.
+To customize the tooltip on your graph you can use the [hovertemplate](https://plotly.com/python/reference/pie/#pie-hovertemplate) attribute of `graph_objects` traces, which is a template string used for rendering the information that appear on hoverbox.
 This template string can include `variables` in %{variable} format, `numbers` in [d3-format's syntax](https://github.com/d3/d3-3.x-api-reference/blob/master/Formatting.md#d3_format), and `date` in [d3-time-format's syntax](https://github.com/d3/d3-time-format). In the example below, the empty `<extra></extra>` tag removes the part of the hover where the trace name is usually displayed in a contrasting color. The `<extra>` tag can be used to display other parts of the hovertemplate, it is not reserved for the trace name.
 
 Note that a hovertemplate customizes the tooltip text, while a [texttemplate](https://plotly.com/python/reference/pie/#pie-texttemplate) customizes the text that appears on your chart. <br>