README.md in puppetlabs_spec_helper-2.10.0 vs README.md in puppetlabs_spec_helper-2.11.0

@@ -189,11 +189,11 @@
 file named `.fixtures.yml` in the root of the project. You can specify a alternate location for that file in the `FIXTURES_YML` environment variable.
 
 You can use the `MODULE_WORKING_DIR` environment variable to specify a diffent location when installing module fixtures via the forge. By default the
 working directory is `<module directory>/spec/fixtures/work-dir`.
 
-When specifying the repo source of the fixture you have a few options as to which revision of the codebase you wish to use.
+When specifying the repo source of the fixture you have a few options as to which revision of the codebase you wish to use, and optionally, the puppet versions where the fixture is needed.
 
  * repo - the url to the repo
  * scm - options include git or hg. This is an optional step as the helper code will figure out which scm is used.
 
    ```yaml
@@ -213,11 +213,16 @@
  * flags - additional flags passed to the module installer (both puppet and scm)
 
    ```yaml
    flags: --verbose
    ```
+ * puppet_version - versions of puppet for which the fixture should be installed. Ruby version constraints are supported. Only works when the `semantic_puppet` gem is available (shipped with puppet 4.0 and up, by default).
 
+   ```yaml
+   puppet_version: '>= 6.0.0'
+   ```
+
  **Note:** ref and branch can be used together to get a specific revision on a specific branch
 
 Fixtures Examples
 -----------------
 Basic fixtures that will symlink `spec/fixtures/modules/my_modules` to the
@@ -261,10 +266,20 @@
     stdlib:
       repo: "git://github.com/puppetlabs/puppetlabs-stdlib"
       ref: "2.6.0"
 ```
 
+Only install the `yumrepo_core` module when testing against Puppet 6 or greater:
+
+```yaml
+fixtures:
+  repositories:
+    yumrepo_core:
+      repo: "git://github.com/puppetlabs/puppetlabs-yumrepo_core"
+      puppet_version: ">= 6.0.0"
+```
+
 Move manifests and siblings to root directory when they are inside a `code` directory:
 
 ```yaml
 fixtures:
   repositories:
@@ -459,19 +474,19 @@
 ```
 context.stubs(:some_method).with(arguments).returns('value')
 ```
 to this:
 ```
-allow(context).to receive(:some_method).with(arguments).and_returns('value')
+allow(context).to receive(:some_method).with(arguments).and_return('value')
 ```
 
 Translate all expectations:
 ```
 context.expects(:some_method).with(arguments).returns('value')
 ```
 to this:
 ```
-expect(context).to receive(:some_method).with(arguments).and_returns('value')
+expect(context).to receive(:some_method).with(arguments).and_return('value')
 ```
 
 Rationale
 ---------