"Plural, not singular"

app/assets/javascripts/player/vt/ansi_interpreter.js.coffee

@@ -193,9 +193,9 @@ class AsciiIo.AnsiInterpreter
         else
           @cb 'eraseToRowEnd'
       when "L"
-        @cb 'insertLine', n or 1
+        @cb 'insertLines', n or 1
       when "M"
-        @cb 'deleteLine', n or 1
+        @cb 'deleteLines', n or 1
       when "P" # DCH - Delete Character, from current position to end of field
         @cb 'deleteCharacters', n or 1
       when "S"

app/assets/javascripts/player/vt/screen_buffer.js.coffee

@@ -258,12 +258,12 @@ class AsciiIo.ScreenBuffer
     @cursorY >= @topMargin() and @cursorY <= @bottomMargin()
 
   scrollUp: (n = 1) ->
-    @insertLine n, @topMargin()
+    @insertLines n, @topMargin()
 
   scrollDown: (n = 1) ->
-    @deleteLine n, @topMargin()
+    @deleteLines n, @topMargin()
 
-  insertLine: (n, l = @cursorY) ->
+  insertLines: (n, l = @cursorY) ->
     return unless @inScrollRegion()
 
     i = 0
@@ -274,7 +274,7 @@ class AsciiIo.ScreenBuffer
 
     @updateLines(l, @bottomMargin())
 
-  deleteLine: (n, l = @cursorY) ->
+  deleteLines: (n, l = @cursorY) ->
     return unless @inScrollRegion()
 
     i = 0

app/assets/javascripts/player/vt/vt.js.coffee

@@ -191,10 +191,10 @@ class AsciiIo.VT
   eraseToRowEnd: ->
     @buffer.eraseToRowEnd()
 
-  insertLine: (n) ->
+  insertLines: (n) ->
     @buffer.insertLine n
 
-  deleteLine: (n) ->
+  deleteLines: (n) ->
     @buffer.deleteLine n
 
   deleteCharacters: (n) ->