Python API documentation grammar and rendering updates (#874)

* updated verb tense for consistency

* remove docstring type hinting in :param lines for consistent rendering

Author: mtaniguchiking

docs/user_guide/python_api.md

@@ -21,7 +21,7 @@ doc
 meaning that anyone working on the same QGIS project file, whether through the
 JupyterLab extension or the Python API, will see the edits you make.
 
-Creating a `GISDocument` object without providing a path to an existing file would create a
+Creating a `GISDocument` object without providing a path to an existing file creates a
 new empty document:
 
 ```python

python/jupytergis_lab/jupytergis_lab/notebook/gis_document.py

@@ -447,8 +447,8 @@ def add_hillshade_layer(
         """
         Add a hillshade layer
 
-        :param str url: URL of the hillshade layer
-        :param str name: The name that will be used for the object in the document, defaults to "Hillshade Layer"
+        :param url: URL of the hillshade layer
+        :param name: The name that will be used for the object in the document, defaults to "Hillshade Layer"
         :param attribution: The attribution.
         """
         if urlParameters is None:
@@ -638,9 +638,9 @@ def create_color_expr(
         """
         Create a color expression used to style the layer
 
-        :param Dict color_stops: Dictionary of stop values to [r, g, b, a] colors
-        :param float band: The band to be colored, defaults to 1.0
-        :param str interpolation_type: The interpolation function. Can be linear, discrete, or exact, defaults to 'linear'
+        :param color_stops: Dictionary of stop values to [r, g, b, a] colors
+        :param band: The band to be colored, defaults to 1.0
+        :param interpolation_type: The interpolation function. Can be linear, discrete, or exact, defaults to 'linear'
         """
 
         if interpolation_type not in ["linear", "discrete", "exact"]:
@@ -777,7 +777,7 @@ def clear_filters(self, layer_id: str):
         """
         Clear filters on a layer
 
-        :param str layer_id: The ID of the layer to clear filters from
+        :param layer_id: The ID of the layer to clear filters from
         """
         layer = self._layers.get(layer_id)