Change IniSettingsFile unit tests to be non-destructive

Author: PlagueHO

.MetaTestOptIn.json

@@ -6,5 +6,8 @@
         "Common Tests - Required Script Analyzer Rules",
         "Common Tests - Flagged Script Analyzer Rules",
         "Common Tests - New Error-Level Script Analyzer Rules",
-        "Common Tests - Custom Script Analyzer Rules"
+        "Common Tests - Custom Script Analyzer Rules",
+        "Common Tests - Validate Example Files To Be Published",
+        "Common Tests - Validate Markdown Links",
+        "Common Tests - Relative Path Length"
 ]

CHANGELOG.md

@@ -15,6 +15,13 @@
 - Refactor Test/Set-TargetResource in ReplaceText to be able to add a key if it
   doesn't exist but should -Fixes
   [Issue#20](https://github.com/PlagueHO/FileContentDsc/issues/20).
+- Opted into common tests:
+  - Common Tests - Validate Example Files To Be Published
+  - Common Tests - Validate Markdown Links
+  - Common Tests - Relative Path Length
+  - Common Tests - Relative Path Length
+- Correct test context description in IniSettingsFile tests to include 'When'.
+- Change IniSettingsFile unit tests to be non-destructive - fixes [Issue #22](https://github.com/PowerShell/FileContentDsc/issues/22).
 
 ## 1.0.0.0