fix error

OP_render_pdf.py

@@ -85,6 +85,7 @@ def pdf_render(fp, multi_page=False):
     
     fp.parent.mkdir(parents=True, exist_ok=True) # mode=0o777
 
+    ## Single pdf
     if multi_page:
         ## In case of sequence path:
         ## Remove padding separator (or add scene range: "0100-0230" ?)
@@ -214,7 +215,7 @@ def swf_render(fp):
         '-s', f'framerate={bpy.context.scene.render.fps}',
         # -z, # use zlib
         str(pdf_fp),
-        # '-o', # no need to put output flag
+        # '-o', # seems like there is no need to add output flag
         str(swf_fp)
     ]
     subprocess.call(cmd)
@@ -233,7 +234,6 @@ class GPEXP_OT_export_as_pdf(bpy.types.Operator):
     def poll(cls, context):
         return True
 
-    # multi_page : bpy.props.BoolProperty(name='multi page pdf', default=False)
     export_type : bpy.props.StringProperty(name='Export Type', default='pdf_sequence')
 
     @classmethod
@@ -388,7 +388,7 @@ class GPEXP_OT_export_as_pdf(bpy.types.Operator):
                     pdf_render(fp, multi_page=False)
                 elif self.export_type == 'pdf':
                     ## TODO: change fp to parent and adapt in pdf render ?
-                    pdf_render(fp, multi_page=self.multi_page)
+                    pdf_render(fp, multi_page=True)
                 elif self.export_type == 'swf':
                     swf_render(fp)
 
@@ -424,4 +424,4 @@ def register():
 
 def unregister():
     for cls in reversed(classes):
-        bpy.utils.unregister_class(cls)
+        bpy.utils.unregister_class(cls)