eintr: Buffer Exercises

 
 4.6 Exercises
 =============
 
    • Write your own ‘simplified-end-of-buffer’ function definition; then
      test it to see whether it works.
 
    • Use ‘if’ and ‘get-buffer’ to write a function that prints a message
      telling you whether a buffer exists.
 
    • Using ‘find-tag’, find the source for the ‘copy-to-buffer’
      function.