Original sentence: His essay "Shut Up And Show Them The Code" criticizes Richard Stallman over tactics to promote open source software.Raymond's claim to being a "Core Linux Developer" has drawn skepticism since he has never had any code accepted into the Linux kernel, and that the extent of his open source code contributions are relatively minor and arguably unimportant.Stallman is the original author of some of the most widely used pieces of free software in the world, including Emacs, GCC, GDB, and GNU Make
Edited sentence: He has taken flak  for his essay "Shut Up And Show Them The Code", where he quibbles with Richard Stallman over tactics used to promote open source software.Raymond's claim to being a "Core Linux Developer" has also drawn criticism on the grounds that he has never had any code accepted into the Linux kernel, and that the extent of his open source code contributions are relatively minor and arguably unimportant