begin refactoring to let cursor move to very last char of file (including unix line ending)

fcore/move.sml

@@ -64,7 +64,7 @@ struct
 
       val textLength = #textLength buffer
       val cursorIdx =
-        if cursorIdx >= textLength - 2 then Int.max (textLength - 2, 0)
+        if cursorIdx >= textLength - 1 then Int.max (textLength - 1, 0)
         else cursorIdx
     in
       NormalFinish.buildTextAndClear

fcore/normal-mode/normal-move.sml

@@ -65,7 +65,7 @@ struct
       val buffer = LineGap.goToEnd buffer
       val {line = bufferLine, textLength, ...} = buffer
 
-      val bufferIdx = Int.max (0, textLength - 2)
+      val bufferIdx = Int.max (0, textLength - 1)
       val bufferLine = bufferLine - 1
 
       val buffer = LineGap.goToIdx (bufferIdx, buffer)
@@ -124,8 +124,8 @@ struct
       val buffer = LineGap.goToIdx (lineIdx, buffer)
       val endOfLineIdx = Cursor.viDlr (buffer, lineIdx, 1)
       val endOfLineIdx =
-        if endOfLineIdx >= #textLength buffer - 2 then
-          Int.max (0, #textLength buffer - 2)
+        if endOfLineIdx >= #textLength buffer - 1 then
+          Int.max (0, #textLength buffer - 1)
         else
           endOfLineIdx
 
@@ -256,8 +256,8 @@ struct
           val lineIdx = Cursor.vi0 (buffer, lineIdx)
 
           val lineIdx =
-            if lineIdx >= #textLength buffer - 2 then
-              Int.max (0, #textLength buffer - 2)
+            if lineIdx >= #textLength buffer - 1 then
+              Int.max (0, #textLength buffer - 1)
             else
               lineIdx
         in

fcore/text-builder/text-builder-with-cursor.sml

@@ -3,11 +3,6 @@ struct
   structure TC = TextConstants
   structure Utils = TextBuilderUtils
 
-  fun isSecondLastChr (pos, str, tl) =
-    case tl of
-      [] => pos = String.size str - 2
-    | _ => false
-
   fun goToFirstLineAfter
     (stl, ltl, posY, lineNumber, absIdx, cursorIdx, env, acc) =
     case (stl, ltl) of
@@ -140,11 +135,6 @@ struct
         #"\n" =>
           if lineNumber + 1 > #lastLineNumber env then
             acc
-          else if isSecondLastChr (pos, str, stl) then
-            if absIdx = cursorIdx then
-              Utils.makeCursor (#startX env, posY + TC.ySpace, env) :: acc
-            else
-              acc
           else
             let
               val acc =

fcore/text-builder/text-builder-with-highlight.sml

@@ -237,11 +237,6 @@ struct
           | #"\n" =>
               if lineNumber + 1 > #lastLineNumber env then
                 acc
-              else if isSecondLastChr (pos, str, stl) then
-                if absIdx = cursorIdx then
-                  Utils.makeCursor (#startX env, posY + TC.ySpace, env) :: acc
-                else
-                  acc
               else
                 let
                   val acc =