Edits to documentation per review feedback

Made intended use of event to ensure completion of submitted
operation from host side of the application explicit.

Removed note that lsplatform is new in dpctl 0.7

Update docs/docfiles/user_guides/QuickStart.rst

Streamlined notice about GPU drivers per PR review feedback.

Co-authored-by: Alexandra <[email protected]>

Author: oleksandr-pavlyk

docs/docfiles/user_guides/QuickStart.rst

@@ -36,12 +36,9 @@ On Windows
 
 .. note::
 
-    The ``dpctl.lsplatform()`` function is new in dpctl 0.7 and will be
-    available in oneAPI 2021.3. If you are following the guide on an older
-    oneAPI installation, use ``dpctl.dump()``. If no GPU platforms are shown,
-    make sure your system has a supported GPU and has the necessary GPU drivers
-    installed. You can install GPU drivers by following the
-    `GPU driver installation guide`_.
+    If no GPU platforms are shown, make sure your system has a supported
+    GPU and the necessary GPU drivers installed.
+    See `GPU driver installation guide`_ to install GPU drivers.
 
 Install Wheel package from Pypi
 ===============================

docs/docfiles/user_guides/manual/dpctl/basic_concepts.rst

@@ -49,7 +49,8 @@ more topical SYCL reference such as the :sycl_spec_2020:`SYCL 2020 spec <>`.
    scheduled for execution on a queue, such as its execution status as well
    as profiling information if the queue the task was submitted to allowed
    for collection of such information. Events can be used to specify task
-   dependencies as well as to synchronize host and devices.
+   dependencies as well as to ensure completion of the associated command from
+   the host.
 
 * **USM**
    Unified Shared Memory (USM) refers to pointer based device memory management.
@@ -64,7 +65,7 @@ more topical SYCL reference such as the :sycl_spec_2020:`SYCL 2020 spec <>`.
    allocation, a "shared" allocation, or a "host" allocation. A "device"
    allocation is not accessible from host, while "shared" or "host" allocations
    are. "Host" allocation refers to an allocation in host memory that is
-   accessible from a device.
+   also accessible from a device.
 
    "Shared" allocations are accessible by both host and device. Runtime manages
    synchronization of host's and device's view into shared allocations. Initial