User-facing content fixups from transifex translator feedback

Author: jonatack

src/qt/intro.cpp

@@ -298,7 +298,7 @@ void Intro::setStatus(int status, const QString &message, quint64 bytesAvailable
 
 void Intro::UpdateFreeSpaceLabel()
 {
-    QString freeString = tr("%1 GB of free space available").arg(m_bytes_available / GB_BYTES);
+    QString freeString = tr("%1 GB of space available").arg(m_bytes_available / GB_BYTES);
     if (m_bytes_available < m_required_space_gb * GB_BYTES) {
         freeString += " " + tr("(of %1 GB needed)").arg(m_required_space_gb);
         ui->freeSpace->setStyleSheet("QLabel { color: #800000 }");

src/wallet/spend.cpp

@@ -778,7 +778,7 @@ static bool CreateTransactionInternal(
     }
     else if ((unsigned int)nChangePosInOut > txNew.vout.size())
     {
-        error = _("Change index out of range");
+        error = _("Transaction change output index out of range");
         return false;
     }