Fix the opening of notebooks in a new tab when using the JupyterLite and Voici directives (#220)

Author: agriyakhetarpal

docs/full.md

@@ -14,4 +14,4 @@ You can access the JupyterLite deployment that `jupyterlite-sphinx` made for you
 
 ```
 
-If you want to open a specific notebook in fullscreen JupyterLab/Notebook, you can use the `path` URL parameter, e.g. `./lite/lab/?path=my_noteboook.ipynb`.
+If you want to open a specific notebook in fullscreen JupyterLab/Notebook, you can use the `path` URL parameter, e.g. `./lite/lab/index.html?path=my_noteboook.ipynb`.

jupyterlite_sphinx/jupyterlite_sphinx.py

@@ -129,7 +129,9 @@ def __init__(
         options = "&".join(
             [f"{key}={quote(value)}" for key, value in lite_options.items()]
         )
-        self.lab_src = f'{prefix}/{app_path}{f"?{options}" if options else ""}'
+        self.lab_src = (
+            f'{prefix}/{app_path}{f"index.html?{options}" if options else ""}'
+        )
 
         super().__init__(
             rawsource,
@@ -170,7 +172,7 @@ def __init__(
             [f"{key}={quote(value)}" for key, value in lite_options.items()]
         )
 
-        iframe_src = f'{prefix}/{app_path}{f"?{options}" if options else ""}'
+        iframe_src = f'{prefix}/{app_path}{f"index.html?{options}" if options else ""}'
 
         if "iframe_src" in attributes:
             if attributes["iframe_src"] != iframe_src:
@@ -246,7 +248,7 @@ def __init__(
             [f"{key}={quote(value)}" for key, value in lite_options.items()]
         )
 
-        iframe_src = f'{prefix}/{app_path}{f"?{options}" if options else ""}'
+        iframe_src = f'{prefix}/{app_path}{f"index.html?{options}" if options else ""}'
 
         super().__init__(rawsource, *children, iframe_src=iframe_src, **attributes)