Updated tooltip text formatting for marriageability

The tooltip text for the "Marriageable" menu item has been updated to use the String.format method for cleaner text replacement. Additionally, the GUI properties file has been adjusted to support this update, changing the replacement syntax to use a placeholder ("%s") for the minimum marriage age.

MekHQ/resources/mekhq/resources/GUI.properties

@@ -178,7 +178,7 @@ miFounder.toolTipText=If this is selected then the person is a founding member o
 miImmortal.text=Immortal
 miImmortal.toolTipText=If this is selected then the person will not be processed during random death \n(standard checks still apply)
 miMarriageable.text=Marriageable
-miMarriageable.toolTipText=If this is selected, then the person will be included as a potential spouse for marriages (married personnel will not be included even if this flag is selected, nor will characters under 0 years old)
+miMarriageable.toolTipText=If this is selected, then the person will be included as a potential spouse for marriages (married personnel will not be included even if this flag is selected, nor will characters under %s years old)
 miTryingToConceive.text=Trying to Conceive
 miTryingToConceive.toolTipText=If this is selected, the person has a chance to have children created through random procreation (this flag is ignored for personnel under 18 years old).
 ### Randomization Menu

MekHQ/src/mekhq/gui/adapter/PersonnelTableMouseAdapter.java

@@ -2165,8 +2165,8 @@ protected Optional<JPopupMenu> createPopupMenu() {
                 || !gui.getCampaign().getCampaignOptions().getRandomMarriageMethod().isNone())
                 && Stream.of(selected).allMatch(p -> p.isMarriageable() == person.isMarriageable())) {
             cbMenuItem = new JCheckBoxMenuItem(resources.getString("miMarriageable.text"));
-            cbMenuItem.setToolTipText(MultiLineTooltip.splitToolTip(resources.getString("miMarriageable.toolTipText")
-                    .replaceAll("0", String.valueOf(gui.getCampaign().getCampaignOptions().getMinimumMarriageAge())), 100));
+            cbMenuItem.setToolTipText(MultiLineTooltip.splitToolTip(String.format(resources.getString("miMarriageable.toolTipText"),
+                    gui.getCampaign().getCampaignOptions().getMinimumMarriageAge()), 100));
             cbMenuItem.setName("miMarriageable");
             cbMenuItem.setSelected(person.isMarriageable());
             cbMenuItem.addActionListener(evt -> {