Logged here so that I don't forget it if I sort out #9 first: we
need to be able to indicate "no repl result please" if we open a new
temporary buffer to display the result.
-* OPEN #12 need to be more careful when searching for completions :NORMAL:
+* RESOLVED #12 escaping when searching for completions :NORMAL:FIXED:
Gets thoroughly confused on completing "read." because the "." is
treated as a regexp "any character" pattern.
* COMMENT: