4.0 | Wiki: change cumulative exit codes table and example paragraph

- Added new column to the cumulative exit codes table to define the codes that were combined, instead of defining them in brackets in the descriptions.

- Removed the now redundant cumulative exit code example.

- Changed the cumulative table header to describe the cumulative behaviour.

Author: yCodeTech

wiki/Advanced-Usage.md

@@ -524,16 +524,13 @@ As of PHP_CodeSniffer 4.0.0, exit codes are cumulative and composed as follows:
 | `16`      | processing error - blocking the actual run of PHP_CodeSniffer, like a parse error in an XML ruleset            |
 | `64`      | requirements for running not met (i.e. minimum PHP version doesn't comply, missing required extensions)        |
 
-Example: when running `phpcs`, if both auto-fixable as well as non-auto-fixable issues are found, the exit code will be `3` (`1` + `2`).
-
-Cumulative exit codes:
-
-| Exit code | Meaning                                                                                                        |
-|-----------|----------------------------------------------------------------------------------------------------------------|
-| `3`       | issues found, mix of auto-fixable and non-auto-fixable (`1` + `2`) (phpcs only)                                |
-| `5`       | issues found, auto-fixable, but some failed to fix (`1` + `4`) (phpcbf only)                                   |
-| `7`       | issues found, mix of auto-fixable and non-auto-fixable, but some failed to fix (`1` + `2` + `4`) (phpcbf only) |
+The exit codes in some situations can be combined, resulting in a new exit code. These cumulative exit codes are as follows:
 
+| Exit code | Exit codes used | Meaning                                                                                      |
+| --------- | --------------- | -------------------------------------------------------------------------------------------- |
+| `3`       | `1` + `2`       | issues found, mix of auto-fixable and non-auto-fixable (phpcs only)                          |
+| `5`       | `1` + `4`       | issues found, auto-fixable, but some failed to fix (phpcbf only)                             |
+| `7`       | `1` + `2` + `4` | issues found, mix of auto-fixable and non-auto-fixable, but some failed to fix (phpcbf only) |
 
 The exit codes can be influenced by the following configuration flags: [`ignore_errors_on_exit`](https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki/Configuration-Options#ignoring-errors-when-generating-the-exit-code), [`ignore_warnings_on_exit`](https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki/Configuration-Options#ignoring-warnings-when-generating-the-exit-code) and [`ignore_non_auto_fixable_on_exit`](https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki/Configuration-Options#ignoring-non-auto-fixable-issues-when-generating-the-exit-code).