fix YAML syntax

appveyor.yml

@@ -33,13 +33,13 @@ build_script:
 
 test_script:
   - ps: Invoke-AppVeyorTests
-  - ps: >-
+  - ps: |
-    if ($null -ne $Env:CoverallsToken) {
+      if ($null -ne $Env:CoverallsToken) {
-      Invoke-CoverageReport
+        Invoke-CoverageReport
-    }
+      }
-    else {
+      else {
-      Write-Warning "No CoverallsToken found. This build seems to be triggered by a PR. Skipping this step..."
+        Write-Warning "No CoverallsToken found. This build seems to be triggered by a PR. Skipping this step..."
-    }
+      }
 
 deploy:
   #- provider: GitHub