BugFix: TTYPE error

I introduced this error in #3889 and it was reported in, and this PR
will close #4066.

Signed-off-by: Stephen Lyons <slysven@virginmedia.com>

src/ctelnet.cpp

@@ -109,7 +109,7 @@ cTelnet::cTelnet(Host* pH, const QString& profileName)
     // than that in the initialisation list so that it is processed as a change
     // to set up the initial encoder
     encodingChanged("UTF-8");
-    termType = QStringLiteral("Mudlet" APP_VERSION);
+    termType = QStringLiteral("Mudlet " APP_VERSION);
     if (QByteArray(APP_BUILD).trimmed().length()) {
         termType.append(QStringLiteral(APP_BUILD));
     }