style(test): add blank lines for linting (reanahub#208)

docs/getting-started/tutorial/index.md

@@ -3,30 +3,37 @@
 ## reana-client test
 
 ### Overview
+
 The `reana-client test` command is used to test properties of REANA workflows, like the presence of certain files in the workspace, the size of the workspace, or the duration of the workflow run. Tests are defined in feature files, which are written in the Gherkin language. This helps to ensure that the workflow behaves as expected, helps to ensure reproducibility, and facilitates behaviour-driven development
 
 ### Feature files
+
 Feature files are used to define the properties that should be tested. They are written in the Gherkin language, which is an easy to understand, human-readable format. Full documentation on feature files is available [here](https://continuous-reuse.docs.cern.ch/).
 
 ### Usage
-Test files can be specified in the `reana.yaml` specification file, or passed as arguments to the `reana-client test` command. The command will run the tests defined in the feature files, and return the status (pass/fail) of each test scenario.
 
+Test files can be specified in the `reana.yaml` specification file, or passed as arguments to the `reana-client test` command. The command will run the tests defined in the feature files, and return the status (pass/fail) of each test scenario.
 
 #### Command syntax
+
 ```{ .console .copy-to-clipboard }
 $ reana-client test -w <name-of-workflow> -n <test.feature> -n <test2.feature>
 ```
+
 #### Options
+
 - `-w`, `--workflow` : Name of the workflow to test _(default: REANA\_WORKON environment variable)_
 - `-n`, `--test-files` : Name of the test file to run _(multiple test files can be specified)_
 - `--help` : Show help message and exit
 
 #### Test file specification
+
 For the command to detect the test files in `reana.yaml`, they must be specified at the time of the creation of the workflow you wish to test _(test file paths are associated with workflow runs)_. Local edits can be made to these specified files, and the tests will be run on the edited files.
 
 If the test files are given in `reana.yaml` _and_ passed as arguments, the command will only run the tests specified in the arguments.
 
 Example of reana.yaml, where the test files are found in the `tests` directory:
+
 ```yaml
 ...
 tests:
@@ -42,6 +49,7 @@ Continuing from the [first example](../first-example), we can add a test to ensu
 Based on the specific analysis found [here](https://github.com/reanahub/reana-demo-root6-roofit/), we see that when the workflow is finished, the workspace should include `code/gendata.C` and `code/fitdata.C` (meaning the inputs were successfully uploaded), and `results/plot.png` (meaning an output was produced). We will also check that these files are a reasonable and expected size, so are likely correct.
 
 This is straightforwardly translated into a test file (`tests/workspace-files.feature`) as follows:
+
 ```gherkin
 Feature: Workspace files 
     Scenario: Input files are present
@@ -56,28 +64,35 @@ Feature: Workspace files
         Then the workspace size should be more than 150KiB
         And the workspace size should be less than 200KiB
 ```
+
 This could be combined into a single scenario, but it is a good idea to seperate different concerns into different scenarios, as this makes it easier to identify the source of a failure.
 
 Then, add the following to the end of the `reana.yaml` file:
+
 ```yaml
 tests:
     files:
         - test/output.feature
 ```
+
 Run the workflow:
+
 ```{ .console .copy-to-clipboard }
 $ reana-client run -w myanalysis
 ```
+
 This uploads the specification, as well as the input and test files, to the REANA server.
 
 Finally, run the test:
+
 ```{ .console .copy-to-clipboard }
 $ reana-client test -w myanalysis
 ```
 
 The output will show the status (pass/fail) of each test scenario. If the test fails, the reason for the failure will be displayed.
 
 Example output:
+
 ```{ .console .copy-to-clipboard }
 Using test file docs.feature
 Summary of docs.feature:
@@ -87,6 +102,7 @@ Tested Files are a reasonable size: passed
 ```
 
 If, after the workflow has been run, you want to test a different set of properties (for example, to ensure the workflow completes in a certain amount of time), you can specify the test files as arguments to the `reana-client test` command. This allows you to test different properties without having to re-run the workflow.
+
 ```{ .console .copy-to-clipboard }
 $ reana-client test -w myanalysis -n tests/duration.feature
-```
+```