[Specification DSL] Be sure to always include spec description when p…

…rinting deprecation warnings.

The install hooks should probably move to the Deprecations module. @irrationalfab any reason this wasn’t done?

lib/cocoapods-core/specification/dsl.rb

@@ -1019,9 +1019,9 @@ def dependency(*args)
       #   end
       #
       def pre_install(&block)
-        CoreUI.warn "The pre install hook of the specification DSL has been " \
-          "deprecated, use the `resource_bundles` or the `prepare_command` " \
-          "attributes."
+        CoreUI.warn "[#{to_s}] The pre install hook of the specification " \
+          "DSL has been deprecated, use the `resource_bundles` or the " \
+          "`prepare_command` attributes."
         @pre_install_callback = block
       end
 
@@ -1049,9 +1049,9 @@ def pre_install(&block)
       #   end
       #
       def post_install(&block)
-        CoreUI.warn "The post install hook of the specification DSL has been " \
-          "deprecated, use the `resource_bundles` or the `prepare_command` " \
-          "attributes."
+        CoreUI.warn "[#{to_s}] The post install hook of the specification " \
+          "DSL has been deprecated, use the `resource_bundles` or the " \
+          "`prepare_command` attributes."
         @post_install_callback = block
       end
 

lib/cocoapods-core/specification/dsl/deprecations.rb

@@ -35,7 +35,7 @@ def singleton_method_added(method)
         end
 
         def documentation=(value)
-          CoreUI.warn "The `documentation` DSL directive of the podspec format has been deprecated."
+          CoreUI.warn "[#{to_s}] The `documentation` DSL directive of the podspec format has been deprecated."
         end
 
         def clean_paths=(value)