COMMENTLINES is the jCommon module of jLab.

 COMMENTLINES  Returns the comment lines from m-files. 
 
    COMMENTLINES is used to facilitate making 'Contents.m' files.
 
    COMMENTLINES returns a string matrix which contains all the comment
    lines, i.e the first line beginning with '%', from all m-files in the
    current directory.  
   
    COMMENTLINES DIRNAME applies to directory DIRNAME. 
    
    COMMENTLINES with no input argument appies itself to the current
    working directory.  
    
    COMMENTLINES FILENAME applies to just m-file FILENAME.
   
    Examples:  commentlines plot
               commentlines elmat
    _________________________________________________________________
    This is part of JLAB --- type 'help jlab' for more information 
    (C) 2002--2019 J.M. Lilly --- type 'help jlab_license' for details