Duplicated string literals make the process of refactoring complex and error-prone, as any change would need to be propagated on all
occurrences.
Exceptions
The following are ignored:
  -  literals with fewer than 5 characters 
-  literals with only letters, numbers, underscores, hyphens and periods 
-  apiVersionproperty of a resource (see rule S6874)
-  typein nested templates
-  $schemaproperty
-  version numbers like 1.0.0or1-0-0
-  escaped template expressions starting with [[, like[[variables('variableName')]