Fix Doxygen issues:
* wrap code blocks in \code ... \endcode;
* refer to parameter names in paragraphs correctly (\arg is not what most
  people want -- it starts a new paragraph);
* use \param instead of \arg to document parameters in order to be consistent
  with the rest of the codebase.

llvm-svn: 163902
diff --git a/llvm/lib/MC/MachObjectWriter.cpp b/llvm/lib/MC/MachObjectWriter.cpp
index 904fbbf..2778ed3 100644
--- a/llvm/lib/MC/MachObjectWriter.cpp
+++ b/llvm/lib/MC/MachObjectWriter.cpp
@@ -145,8 +145,8 @@
 
 /// WriteSegmentLoadCommand - Write a segment load command.
 ///
-/// \arg NumSections - The number of sections in this segment.
-/// \arg SectionDataSize - The total size of the sections.
+/// \param NumSections The number of sections in this segment.
+/// \param SectionDataSize The total size of the sections.
 void MachObjectWriter::WriteSegmentLoadCommand(unsigned NumSections,
                                                uint64_t VMSize,
                                                uint64_t SectionDataStartOffset,