Fixes various typos in the documentation (isaac-sim#321)

## Description

This MR improves the documentation:

- fix typo: "For completion" with "For completeness" 
- fix typo: reset 
- fix typo: blocks 
- fix typo: remove "is"

Fixes isaac-sim#302, isaac-sim#303, isaac-sim#304

## Type of change

- This change requires a documentation update

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./orbit.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have run all the tests with `./orbit.sh --test` and they pass
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

CONTRIBUTORS.md

@@ -44,6 +44,7 @@ Guidelines for modifications:
 * Ritvik Singh
 * Rosario Scalise
 * Shafeef Omar
+* Vladimir Fokow
 
 ## Acknowledgements
 

docs/source/setup/developer.rst

@@ -219,7 +219,7 @@ class.
    if __name__ == "__main__":
       # get simulation context
       simulation_context = SimulationContext()
-      # rest and play simulation
+      # reset and play simulation
       simulation_context.reset()
       # step simulation
       simulation_context.step()

docs/source/tutorials/00_sim/launch_app.rst

@@ -116,7 +116,7 @@ In the case where these arguments are provided from the CLI, they will override
 as we will demonstrate later in this tutorial.
 
 These arguments can be used with any script that starts the simulation using :class:`~app.AppLauncher`,
-with one exception, ``--offscreen_render``. This setting is sets the rendering pipeline to use the
+with one exception, ``--offscreen_render``. This setting sets the rendering pipeline to use the
 offscreen renderer. However, this setting is only compatible with the :class:`omni.isaac.orbit.sim.SimulationContext`.
 It will not work with Isaac Sim's :class:`omni.isaac.core.simulation_context.SimulationContext` class.
 For more information on this flag, please see the :class:`~app.AppLauncher` API documentation.

docs/source/tutorials/00_sim/spawn_prims.rst

@@ -33,9 +33,9 @@ Scene designing in Omniverse is built around a software system and file format c
 It allows describing 3D scenes in a hierarchical manner, similar to a file system. Since USD is a comprehensive framework,
 we recommend reading the `USD documentation`_ to learn more about it.
 
-For completion, we introduce the must know concepts of USD in this tutorial.
+For completeness, we introduce the must know concepts of USD in this tutorial.
 
-* **Primitives (Prims)**: These are the basic building block of a USD scene. They can be thought of as nodes in a scene
+* **Primitives (Prims)**: These are the basic building blocks of a USD scene. They can be thought of as nodes in a scene
   graph. Each node can be a mesh, a light, a camera, or a transform. It can also be a group of other prims under it.
 * **Attributes**: These are the properties of a prim. They can be thought of as key-value pairs. For example, a prim can
   have an attribute called ``color`` with a value of ``red``.

docs/source/tutorials/03_envs/create_base_env.rst

@@ -202,7 +202,7 @@ started the simulation.
 
 In this tutorial, we learned about the different managers that help define a base environment. We
 include more examples of defining the base environment in the ``orbit/source/standalone/tutorials/03_envs``
-directory. For completion, they can be run using the following commands:
+directory. For completeness, they can be run using the following commands:
 
 .. code-block:: bash
 

docs/source/tutorials/04_sensors/add_sensors_on_robot.rst

@@ -186,7 +186,7 @@ To stop the simulation, you can either close the window, or press ``Ctrl+C`` in
 
 While in this tutorial, we went over creating and using different sensors, there are many more sensors
 available in the :mod:`sensors` module. We include minimal examples of using these sensors in the
-``source/standalone/tutorials/04_sensors`` directory. For completion, these scripts can be run using the
+``source/standalone/tutorials/04_sensors`` directory. For completeness, these scripts can be run using the
 following commands:
 
 .. code-block:: bash