xargs: lint, remove controversial example

pages/common/xargs.md

@@ -10,10 +10,6 @@
 
 `{{arguments_null_terminated}} | xargs -0 {{command}}`
 
-- delete all files that start with 'M'
+- Delete all files that start with 'M':
 
 `ls M* | xargs rm`
-
-- assign incoming arguments to a variable so that they may be used in the middle of a command
-
-`ls M* | xargs -J % cp % ~/Desktop`