fix bug in line_gap.sml's 'lineNumberToIdxRight' function: when calling 'lineNumberToIdxRight', pass tails of 'rightStrings' and 'rightLines', instead of passing 'rightStrings' and 'rightLines' themselves, so that we advance through the list

src/line_gap.sml

@@ -3238,12 +3238,7 @@ struct
             end
           else
             lineNumberToIdxRight
-              ( findLine
+              (findLine, curIdx + String.size shd, nextLine, stl, ltl)
-              , curIdx + String.size shd
-              , nextLine
-              , rightStrings
-              , rightLines
-              )
         end
     | (_, _) => curIdx