function myFunction() {

  var r=SpreadsheetApp.getActiveSheet().getDataRange();
  var rws=r.getNumRows();
  var cls=r.getNumColumns();
  var i,j,a,find,repl;
  find="n";
  repl="                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                ";
  for (i=1;i<=rws;i++) {
    for (j=1;j<=cls;j++) {
      a=r.getCell(i, j).getValue();
      if (r.getCell(i,j).getFormula()) {continue;}
      try {
        a=a.replace(find,repl);
        r.getCell(i, j).setValue(a);
      }
      catch (err) {continue;}
    }
  }
}

function myFunction() {
   var ss = SpreadsheetApp.getActiveSpreadsheet();
   var sheet = ss.getActiveSheet();
   var maxRows = sheet.getMaxRows();
   //Logger.log(maxRows);
   for (var i=2; i<=maxRows;)
   {
     sheet.insertRowAfter(i);
     range = 'A'+ i.toString() + ':Z' + (i+1).toString();
     sheet.getRange(range).mergeVertically();
     //sheet.setRowHeight(i+1, 1);
     i += 2;
   }
}