LibVT: Give proper names to SD and SU

Userland/Libraries/LibVT/Terminal.cpp

@@ -449,7 +449,7 @@ void Terminal::ED(const ParamVector& params)
     }
 }
 
-void Terminal::escape$S(const ParamVector& params)
+void Terminal::SU(const ParamVector& params)
 {
     int count = 1;
     if (params.size() >= 1)
@@ -459,7 +459,7 @@ void Terminal::escape$S(const ParamVector& params)
         scroll_up();
 }
 
-void Terminal::escape$T(const ParamVector& params)
+void Terminal::SD(const ParamVector& params)
 {
     int count = 1;
     if (params.size() >= 1)
@@ -633,10 +633,10 @@ void Terminal::execute_escape_sequence(u8 final)
         escape$P(params);
         break;
     case 'S':
-        escape$S(params);
+        SU(params);
         break;
     case 'T':
-        escape$T(params);
+        SD(params);
         break;
     case 'L':
         escape$L(params);

Userland/Libraries/LibVT/Terminal.h

@@ -204,10 +204,14 @@ private:
     // ICH - Insert Character
     void ICH(const ParamVector&);
 
+    // SU - Scroll Up (called "Pan Down" in VT510)
+    void SU(const ParamVector&);
+
+    // SD - Scroll Down (called "Pan Up" in VT510)
+    void SD(const ParamVector&);
+
     // FIXME: Find the right names for these.
     void escape$t(const ParamVector&);
-    void escape$S(const ParamVector&);
-    void escape$T(const ParamVector&);
     void escape$L(const ParamVector&);
     void escape$M(const ParamVector&);
     void escape$P(const ParamVector&);