Merge pull request #9661 from swiftlang/cherrypick-swift/release/6.1-4b5a8d683589

[🍒 swift/release/6.1] [lldb] Make sure completions don't end with newlines (llvm#117054)

Author: JDevlieghere

lldb/include/lldb/Utility/CompletionRequest.h

@@ -52,8 +52,8 @@ class CompletionResult {
   public:
     Completion(llvm::StringRef completion, llvm::StringRef description,
                CompletionMode mode)
-        : m_completion(completion.str()), m_descripton(description.str()),
-          m_mode(mode) {}
+        : m_completion(completion.rtrim().str()),
+          m_descripton(description.rtrim().str()), m_mode(mode) {}
     const std::string &GetCompletion() const { return m_completion; }
     const std::string &GetDescription() const { return m_descripton; }
     CompletionMode GetMode() const { return m_mode; }