Update usage docs

docs/usage.rst

@@ -125,24 +125,25 @@ the number of false positive issues. The MythX CLI will try to infer the
 :code:`solc` version based on the pragma set in the source code. An explicit
 compiler version can be specified with the :code:`--solc-version` flag.
 
-By default, the MythX CLI submits an analysis request for each contract it
-encounters. Depending on the project layout, this can result in duplicate
-submission of source code (e.g. when all code is flattened in a single file).
-To avoid this issue, the :code:`--include` parameter can be passed multiple
-times to specify the contracts that are the target of this submission.
+By default, the MythX CLI will submit the bytecode of the target contract
+(if specified), and add the source code and AST information of its
+dependencies to the request.
+This can result in duplicate submission of source code (e.g. when all code
+is flattened in a single file). To avoid this issue, the :code:`--include`
+parameter can be passed multiple times to specify the contracts that are
+the target of this submission.
 
 .. code-block:: console
 
     $ mythx analyze --include EstateRegistry --include LANDRegistry --include LANDStorage
 
 
-This will effectively whitelist the specified contract names and exclude every
-other contract from submission. Please note that this option is case sensitive.
-If a contract name cannot be found in the project, an error is thrown.
+Please note that this option is case sensitive. If the contract's name cannot
+be found in the project, an error is thrown.
 
-Alternatively, if you are passing specific Solidity files as arguments to the
-:code:`analyze` subcommand, you can also specify the contract name to submit
-separated by a colon from the file path. E.g.
+Alternatively, if specific Solidity files are passed as arguments to the
+:code:`analyze` subcommand, the contract name to submit can also be specified
+by separating it with a colon from the source file path. E.g.
 
 .. code-block:: console