Improved the doc comment for getCommentsInFile

[hokein]

thanks!

[MaskRay]

clang/include/clang/AST/RawCommentList.h

203

in in

Typo?

clang/include/clang/AST/RawCommentList.h

 /// sorted in order of appearance in the translation unit.
 class RawCommentList {
 public:
   RawCommentList(SourceManager &SourceMgr) : SourceMgr(SourceMgr) {}
 
   void addComment(const RawComment &RC, const CommentOptions &CommentOpts,
                   llvm::BumpPtrAllocator &Allocator);
 
-  /// \returns nullptr in case there are no comments in in \p File.
+  /// \returns A mapping from an offset of the start of the comment to the
+  /// comment itself, or nullptr in case there are no comments in in \p File.
   const std::map<unsigned, RawComment *> *getCommentsInFile(FileID File) const;
 
   bool empty() const;
 
   unsigned getCommentBeginLine(RawComment *C, FileID File,
                                unsigned Offset) const;
   unsigned getCommentEndOffset(RawComment *C) const;