ShellPkg: Allow for format character strings to be typed in editor without having effect on editor screen.

signed-off-by: jcarsey
reviewed-by: leegrosenbaum

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12965 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellLib/UefiShellLib.c

@@ -2720,6 +2720,11 @@ InternalShellPrintWorker(
     //
     if (ResumeLocation != NULL) {
       if (*(ResumeLocation-1) == L'^') {
+        //
+        // Move cursor back 1 position to overwrite the ^
+        //
+        gST->ConOut->SetCursorPosition(gST->ConOut, gST->ConOut->Mode->CursorColumn - 1, gST->ConOut->Mode->CursorRow);
+
         //
         // Print a simple '%' symbol
         //