Update string_content method to support multiline strings, add test for same

1 files changed, 3 insertions, 2 deletions

diff --git a/Library/Homebrew/rubocops/extend/formula_cop.rb b/Library/Homebrew/rubocops/extend/formula_cop.rb
index 4120be6ef..3f70086b3 100644
--- a/Library/Homebrew/rubocops/extend/formula_cop.rb
+++ b/Library/Homebrew/rubocops/extend/formula_cop.rb
@@ -180,9 +180,10 @@ module RuboCop
         node.source_range.source_buffer
       end
 
-      # Returns the string representation if node is of type str
+      # Returns the string representation if node is of type str(plain) or dstr(interpolated)
       def string_content(node)
-        node.str_content if node.type == :str
+        return node.str_content if node.type == :str
+        node.each_child_node(:str).map(&:str_content).join("") if node.type == :dstr
       end
 
       # Returns printable component name