further fixes to make fan charts work with debian’s outdated latex distro (as...

further fixes to make fan charts work with debian’s outdated latex distro (as with 0de30dc5, to be reverted when Debian disto is upgraded)

src/@graph/writeGraphFile.m

@@ -61,7 +61,11 @@ else
     dd = o.xrange;
 end
 
-fprintf(fid, '\\begin{axis}[%%\nset layers,');
+if ispc || ismac
+    fprintf(fid, '\\begin{axis}[%%\nset layers,\n');
+else
+    fprintf(fid, '\\begin{axis}[%%\n');
+end
 % set tick labels
 if isempty(o.xTickLabels)
     stringsdd = strings(dd);