fix typo

cups-pdf-postprocess.py

@@ -87,22 +87,22 @@ class CPP(QWidget):
     self._duplex.addItem("Short Side", "duplex=two-sided-long-edge")
     self._duplex.setCurrentIndex(1)
     self._pdfbook = QCheckBox('Use pdfbook', self)
-    self._stample = QCheckBox('Stample', self)
-    self._stample.setEnabled(False)
+    self._staple = QCheckBox('Staple', self)
+    self._staple.setEnabled(False)
 
     def _pdfbook_changed(enabled):
-      self._stample.setEnabled(enabled)
+      self._staple.setEnabled(enabled)
       self._duplex.setEnabled(not enabled)
       if enabled:
         self._duplex.setCurrentIndex(1)
       else:
-        self._stample.setChecked(False)
+        self._staple.setChecked(False)
 
     self._pdfbook.clicked[bool].connect(_pdfbook_changed)
     hbox.addWidget(self._duplex)
     vbox.addLayout(hbox)
     vbox.addWidget(self._pdfbook)
-    vbox.addWidget(self._stample)
+    vbox.addWidget(self._staple)
 
     o = QComboBox(self)
     for (p, cmd) in PRINTERS:
@@ -151,7 +151,7 @@ class CPP(QWidget):
     else:
       cmd = self._printer.currentData().copy()
       cmd += [ "-o", self._duplex.currentData() ]
-      if self._stample.isChecked():
+      if self._staple.isChecked():
         cmd += [ "-o", "XRFold=BiFoldStaple" ]
       cmd.append("-")
       pipeline.append(cmd)