reread preamble for every file so it doesn't "grow"

src/MATLAB/+license/goHeader.m

@@ -41,13 +41,13 @@ if bC
 else
     flist = dir(fullfile(folder, '*.m'));
     strToken='%%%%%%%%%%';
-    txtPreamble = license.getFileText('.\+license\LicenseHeader.m');
 end
 for ff=1:length(flist)
     if any(strcmp(excludeFiles,flist(ff).name))
         continue
     end
     txt = license.getFileText(fullfile(folder,flist(ff).name));
+    txtPreamble = license.getFileText('.\+license\LicenseHeader.m');
 
     
     idxPreamble = find(cellfun(@(x) ~isempty(strfind(x,strToken)),txt),2);