anchor.diff:      - command: ./scripts/tests.sh
         label: tests
         if: |
  -      	// Don't when the message contains "skip me"
  +      	// Don't when the message contains "skip tests"
         	// Only run on feature branches
  -        build.message != "skip me" &&
  +        build.message != "skip tests" &&
             build.branch == /^feature\/.+/
   ```
   
  
positive.code: 
  Use the `if` attribute in your pipeline's YAML to conditionally run a step.
  
  In the below example, the `tests` step will only be run if the build message does not contain the string "skip me".
  
  ```yml
  steps:
  	- command: ./scripts/tests.sh
  	  label: tests
  	  if: build.message != "skip me"
  ```
  
  The `if` attribute can be used in any step type, and with any of the supported expressions and parameters. However, it cannot be used at the same time as the `branches` attribute.
  
  Multi-line conditionals can be added with the `|` character:
  
  
negative.code:  			<td><code>true false</code></td>
   		</tr>
   		<tr>
   			<td>Null</td>
   			<td><code>null</code></td>
   		</tr>
   		<tr>
   			<td>Parentheses</td>
   			<td><code>( )</code></td>
   		</tr>
  