Fix README.rst (#365)

The current README.rst has references to configure bandit runs using a custom
.INI-like file. In reality, that file should actually be a YAML file.
Using the INI example provided will result in:

` [main] ERROR bandit.cfg : Error parsing file. `

This patch set updates the configuration so it is of proper YAML format so
the execution will not error out.

Signed-off-by: Tin Lam <tinlam@gmail.com>

Co-authored-by: Luke Hinds <lukehinds@gmail.com>
Co-authored-by: Eric Brown <ericwb@users.noreply.github.com>

README.rst

@@ -142,26 +142,28 @@ An optional config file may be supplied and may include:
 
 Per Project Command Line Args
 -----------------------------
-Projects may include a `.bandit` file that specifies command line arguments
-that should be supplied for that project. The currently supported arguments
-are:
+Projects may include a YAML file named `.bandit` that specifies command line
+arguments that should be supplied for that project. The currently supported
+arguments are:
 
  - targets: comma separated list of target dirs/files to run bandit on
  - exclude: comma separated list of excluded paths
  - skips: comma separated list of tests to skip
  - tests: comma separated list of tests to run
 
-To use this, put a .bandit file in your project's directory. For example:
+To use this, put a YAML file named `.bandit` in your project's directory.
+For example:
 
 ::
 
-   [bandit]
    exclude: /test
 
 ::
 
-   [bandit]
-   tests: B101,B102,B301
+   tests:
+     - B101
+     - B102
+     - B301
 
 
 Exclusions