message: docs: fix grammar
  PR Close
diff: @@ -68,7 +68,7 @@ When declaring a template reference variable on an element without defining a va
  - **NgTemplate**: TemplateRef
  Referencing an element by its directive needs the directive `exportAs` property set as reference value.
  -In case of unspecified variable value, the reference will return an `HTMLElement`, even if the element has one or more directive applied to itself.
  +In case of an unspecified variable value, the reference will return an `HTMLElement`, even if the element has one or more directive applied to itself.
  ## Template variable scope
  