Remove leading and trailing whitespace when choosing filenames. Fixes issue #401.

src/addnewtorrentdialog.cpp

@@ -394,7 +394,7 @@ void AddNewTorrentDialog::renameSelectedFile()
   bool ok;
   const QString new_name_last = QInputDialog::getText(this, tr("Rename the file"),
                                                       tr("New name:"), QLineEdit::Normal,
-                                                      index.data().toString(), &ok);
+                                                      index.data().toString(), &ok).trimmed();
   if (ok && !new_name_last.isEmpty()) {
     if (!fsutils::isValidFileSystemName(new_name_last)) {
       QMessageBox::warning(this, tr("The file could not be renamed"),

src/properties/propertieswidget.cpp

@@ -511,7 +511,7 @@ void PropertiesWidget::renameSelectedFile() {
   bool ok;
   QString new_name_last = QInputDialog::getText(this, tr("Rename the file"),
                                                 tr("New name:"), QLineEdit::Normal,
-                                                index.data().toString(), &ok);
+                                                index.data().toString(), &ok).trimmed();
   if (ok && !new_name_last.isEmpty()) {
     if (!fsutils::isValidFileSystemName(new_name_last)) {
       QMessageBox::warning(this, tr("The file could not be renamed"),

src/transferlistwidget.cpp

@@ -593,7 +593,7 @@ void TransferListWidget::askNewLabelForSelection() {
   bool invalid;
   do {
     invalid = false;
-    const QString label = QInputDialog::getText(this, tr("New Label"), tr("Label:"), QLineEdit::Normal, "", &ok);
+    const QString label = QInputDialog::getText(this, tr("New Label"), tr("Label:"), QLineEdit::Normal, "", &ok).trimmed();
     if (ok && !label.isEmpty()) {
       if (fsutils::isValidFileSystemName(label)) {
         setSelectionLabel(label);