WordNet (r) 3.0 (2006):

text editor
    n 1: an editor who prepares text for publication [syn: copy
         editor, copyreader, text editor]
    2: (computer science) an application that can be used to create
       and view and edit text files

The Free On-line Dictionary of Computing (30 December 2018):

text editor

    A utility program for creating and modifying
   text files.  This differs from a word processor in that
   the word processors often embed special control codes or
   escape sequences in the file to control formatting.

   (1996-11-15)