Add missing newline in science_dialog_text()

With tech upkeep enabled, the text was looking like:

  Progress: %1 turn/advance (%1 bulb/turn)Bulbs produced per turn: %1

Add a newline after the closing parenthesis.

client/text.cpp

@@ -849,9 +849,9 @@ const QString science_dialog_text()
 
   if (game.info.tech_upkeep_style != TECH_UPKEEP_NONE) {
     // perturn is defined as: (bulbs produced) - upkeep
+    str += qendl();
     str += QString(_("Bulbs produced per turn: %1"))
-               .arg(QString::number(perturn + upkeep))
-           + qendl();
+               .arg(QString::number(perturn + upkeep));
     /* TRANS: keep leading space; appended to "Bulbs produced per turn: %d"
      */
     str += QString(_(" (needed for technology upkeep: %1)"))