fix test

Author: SteveL-MSFT

dsc/tests/dsc_functions.tests.ps1

@@ -295,7 +295,7 @@ Describe 'tests for function expressions' {
     $out = dsc -l trace config get -i $config_yaml 2>$TestDrive/error.log | ConvertFrom-Json
     $LASTEXITCODE | Should -Be 2 -Because (Get-Content $TestDrive/error.log -Raw)
     $out | Should -BeNullOrEmpty -Because "Output should be null or empty"
-    (Get-Content $TestDrive/error.log -Raw) | Should -Match 'utcNow function can only be used as a parameter default'
+    (Get-Content $TestDrive/error.log -Raw) | Should -Match "The 'utcNow()' function can only be used as a parameter default"
   }
 
   It 'uniqueString function works for: <expression>' -TestCases @(
@@ -428,7 +428,7 @@ Describe 'tests for function expressions' {
     $LASTEXITCODE | Should -Be 0 -Because (Get-Content $TestDrive/error.log -Raw)
     ($out.results[0].result.actualState.output | Out-String) | Should -BeExactly ($expected | Out-String)
   }
-  
+
   It 'skip function works for: <expression>' -TestCases @(
     @{ expression = "[skip(createArray('a','b','c','d'), 2)]"; expected = @('c', 'd') }
     @{ expression = "[skip('hello', 2)]"; expected = 'llo' }