Add comment about using default path.

python-package/lets_plot/__init__.py

@@ -229,11 +229,12 @@ def setup_show_ext(cls, *,
 
  .. code-block::
  :linenos:
- :emphasize-lines: 3
+ :emphasize-lines: 4
 
  # Show the plot in the Chrome web browser for Windows.
+ # This is the default setup path. Replace the file path with your own if it differs.
  from lets_plot import *
- LetsPlot.setup_show_ext(exec = 'chrome.exe --app=%s')
+ LetsPlot.setup_show_ext(exec = 'C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe --app=%s')
  p = ggplot() + geom_point(x=0, y=0)
  p.show()
 
@@ -253,9 +254,10 @@ def setup_show_ext(cls, *,
 
  .. code-block::
  :linenos:
- :emphasize-lines: 3
+ :emphasize-lines: 4
 
  # Show the plot in the Chrome web browser for macOS in the application mode.
+ # This is the default setup path. Replace the path with your own if it differs.
  from lets_plot import *
  LetsPlot.setup_show_ext(exec = '/Applications/Google\\ Chrome.app/Contents/MacOS/Google\\ Chrome --app=%s')
  p = ggplot() + geom_point(x=0, y=0)