docs: driver-api: iio: fix errors in documentation

Improve IIO documentation by fixing a few mistakes.

Signed-off-by: Tomasz Duszynski <[e-mail]>
Acked-by: Jonathan Cameron <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/driver-api/iio/buffers.rst

···
 ================
 
 The meta information associated with a channel reading placed in a buffer is
-called a scan element . The important bits configuring scan elements are
+called a scan element. The important bits configuring scan elements are
 exposed to userspace applications via the
 :file:`/sys/bus/iio/iio:device{X}/scan_elements/*` directory. This file contains
 attributes of the following form:

Documentation/driver-api/iio/core.rst

···
 Core elements
 =============
 
-The Industrial I/O core offers a unified framework for writing drivers for
-many different types of embedded sensors. a standard interface to user space
+The Industrial I/O core offers both a unified framework for writing drivers for
+many different types of embedded sensors and a standard interface to user space
 applications manipulating sensors. The implementation can be found under
 :file:`drivers/iio/industrialio-*`
 
···
 ----------------------
 
 * struct :c:type:`iio_dev` - industrial I/O device
-* :c:func:`iio_device_alloc()` - alocate an :c:type:`iio_dev` from a driver
+* :c:func:`iio_device_alloc()` - allocate an :c:type:`iio_dev` from a driver
 * :c:func:`iio_device_free()` - free an :c:type:`iio_dev` from a driver
 * :c:func:`iio_device_register()` - register a device with the IIO subsystem
 * :c:func:`iio_device_unregister()` - unregister a device from the IIO

Documentation/driver-api/iio/hw-consumer.rst

···
 ===========
 HW consumer
 ===========
-An IIO device can be directly connected to another device in hardware. in this
+An IIO device can be directly connected to another device in hardware. In this
 case the buffers between IIO provider and IIO consumer are handled by hardware.
 The Industrial I/O HW consumer offers a way to bond these IIO devices without
 software buffer for data. The implementation can be found under

Documentation/driver-api/iio/triggers.rst

···
 
 * :file:`/sys/bus/iio/devices/iio:device{X}/trigger/*`, this directory is
   created once the device supports a triggered buffer. We can associate a
-  trigger with our  device by writing the trigger's name in the
+  trigger with our device by writing the trigger's name in the
   :file:`current_trigger` file.
 
 IIO trigger setup