Composer updates query:

When you are prompted by Composer during an update of your Drupal site - there are a few different options.

Here's the expanded version of each:

Discard changes [y,n,v,d,s,?]
y - discard changes and apply the update
n - abort the update and let you manually clean things up
v - view modified files
d - view local modifications (diff)
s - stash changes and try to reapply them after the update

donmc@cooee120 /var/www/jaxbeachtech.com.d8 $ composer update --with-dependencies
Gathering patches for root package.
No patches supplied.
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 2 updates, 6 removals
  - Removing drupal/coder (8.2.12)
    The package has modified files:
    D coder_sniffer/Drupal/Test/Array/ArrayUnitTest.inc
    D coder_sniffer/Drupal/Test/Array/ArrayUnitTest.inc.fixed
    D coder_sniffer/Drupal/Test/Array/ArrayUnitTest.php
    D coder_sniffer/Drupal/Test/Array/DisallowLongArraySyntaxUnitTest.php
    D coder_sniffer/Drupal/Test/Array/disallow_long_array_d7/DisallowLongArraySyntaxUnitTest.1.inc
    D coder_sniffer/Drupal/Test/Array/disallow_long_array_d7/disallow_long_array_d7.info
    D coder_sniffer/Drupal/Test/Array/disallow_long_array_d8/DisallowLongArraySyntaxUnitTest.2.inc
    D coder_sniffer/Drupal/Test/Array/disallow_long_array_d8/DisallowLongArraySyntaxUnitTest.2.inc.fixed
    D coder_sniffer/Drupal/Test/Array/disallow_long_array_d8/disallow_long_array_d8.info.yml
    D coder_sniffer/Drupal/Test/Classes/ClassCreateInstanceUnitTest.inc
    238 more files modified, choose "v" to view the full list
    Discard changes [y,n,v,d,?]? y
  - Removing doctrine/instantiator (1.0.5)
  - Removing behat/mink-selenium2-driver (dev-master)
    The package has modified files:
    D composer.json
    Discard changes [y,n,v,d,?]? y
  - Removing behat/mink-goutte-driver (v1.2.1)
  - Removing behat/mink-browserkit-driver (1.3.3)
  - Removing behat/mink (dev-master)
    The package has modified files:
    D composer.json
    D tests/Driver/CoreDriverTest.php
    D tests/Element/DocumentElementTest.php
    D tests/Element/ElementTest.php
    D tests/Element/NodeElementTest.php
    D tests/Exception/ElementExceptionTest.php
    D tests/Exception/ElementHtmlExceptionTest.php
    D tests/Exception/ElementNotFoundExceptionTest.php
    D tests/Exception/ElementTextExceptionTest.php
    D tests/Exception/ExpectationExceptionTest.php
    12 more files modified, choose "v" to view the full list
    Discard changes [y,n,v,d,?]? y
Gathering patches for root package.
No patches supplied.
Gathering patches for dependencies. This might take a minute.
  - Updating composer/installers (v1.5.0 => v1.6.0): Downloading (100%)         
  - Updating drupal/bootstrap_barrio (4.21.0 => 4.22.0): Downloading (100%)         
Writing lock file
Generating autoload files
donmc@cooee120 /var/www/jaxbeachtech.com.d8 $