refactor: make savetodat an util to reuse later

+af_tools/+utils/savecoordtodat.m

+function savecoordtodat(filename, header, x, y)
+% SAVECOORDTODAT Saves the airfoil coordinates to a dat file
+
+import af_tools.utils.vecttocol;
+
+x = vecttocol(x);
+y = vecttocol(y);
+
+data=num2str([x, y],'%0.7f  ');
+contents=char(header,data);
+dlmwrite(filename,contents,'delimiter','')
+
+end

+af_tools/nacaairfoil.m

@@ -73,7 +73,7 @@ narginchk(0,6);
 
 % Import other functions from this package
 import af_tools.nacacamber;
-import af_tools.utils.parsenacainputs;
+import af_tools.utils.*;
 
 OPTION_LIST = {'spacing', 'zerote', 'savedat'};
 
@@ -122,7 +122,9 @@ y = [yu, fliplr(yl(1:end-1))];
 
 % Save coordinates to dat file
 if savedat
-    savetodat(digits, x, y, spacing);
+    header = ['NACA',digits,' - ',spacing,' spacing'];
+    filename = ['naca', digits, '.dat'];
+    savecoordtodat(filename, header, x, y)
 end
 
 end
@@ -155,14 +157,3 @@ zerote = p.Results.zerote;
 savedat = p.Results.savedat;
 
 end
-
-function savetodat(digits, x, y, spacing)
-% SAVETODAT Saves the airfoil coordinates to a dat file
-
-header = ['NACA',digits,' (',spacing,' spacing)'];
-data=num2str([x; y]');
-contents=char(header,data);
-fileName=['naca', digits, '.dat'];
-dlmwrite(fileName,contents,'delimiter','')
-
-end