adding tokens around *.backup

pages/common/xargs.md

@@ -9,7 +9,7 @@
 
 - Delete all files with a `.backup` extension:
 
-`find . -name '*.backup' | xargs rm -v`
+`find . -name {{'*.backup'}} | xargs rm -v`
 
 - Convert newlines in the input into NUL (`\0`) characters, and split on those only (useful if the input to xargs contains spaces):