message: [Doc] Update installation doc for Dremio
  * update installation doc for Dremio
  Customers fail to install pyodbc properly which on linux systems requires you to install unixodbc-devel package. Update the instructions to make it clear.
  * fix new line
diff: @@ -377,7 +377,7 @@ Here's a list of some of the recommended packages.
  +------------------+---------------------------------------+-------------------------------------------------+
  | CockroachDB | ``pip install cockroachdb`` | ``cockroachdb://`` |
  +------------------+---------------------------------------+-------------------------------------------------+
  -| Dremio | ``pip install sqlalchemy_dremio`` | ``dremio://user:pwd@host:31010/`` |
  +| Dremio | ``pip install sqlalchemy_dremio`` | ``dremio://`` |
  +------------------+---------------------------------------+-------------------------------------------------+
  | Elasticsearch | ``pip install elasticsearch-dbapi`` | ``elasticsearch+http://`` |
  +------------------+---------------------------------------+-------------------------------------------------+
  @@ -741,6 +741,8 @@ Dremio
  Install the following dependencies to connect to Dremio:
  * Dremio SQLAlchemy: ``pip install sqlalchemy_dremio``
  +
  + * If you receive any errors during the installation of ``sqlalchemy_dremio``, make sure to install the prerequisites for PyODBC properly by following the instructions for your OS here: https://github.com/narendrans/sqlalchemy_dremio#installation
  * Dremio's ODBC driver: https://www.dremio.com/drivers/
  Example SQLAlchemy URI: ``dremio://dremio:dremio123@localhost:31010/dremio``
  