MoLi

Also, to clarify, the command-line argument referenced for displaying title here was --versionType, not -Dminecraft.launcher.brand.

Code Before 26.1:

String s = "Minecraft " + SharedConstants.getCurrentVersion().name();
if (this.minecraft.isDemo()) {
    s = s + " Demo";
} else {
    s = s + ("release".equalsIgnoreCase(this.minecraft.getVersionType()) ? "" : "/" + this.minecraft.getVersionType());
}

if (Minecraft.checkModStatus().shouldReportAsModified()) {
    s = s + I18n.get("menu.modded");
}

Code After 26.1:

String versionString = "Minecraft " + SharedConstants.getCurrentVersion().name();
if (this.minecraft.isDemo()) {
    versionString = versionString + " Demo";
}

if (Minecraft.checkModStatus().shouldReportAsModified()) {
    versionString = versionString + I18n.get("menu.modded");
}

The else statement has disappeared.