Fixed incorrect bitwise operation.

This consolidates changes from r3135 and r3149 and fixes an additional restore selection case.

core/events.lua

@@ -415,7 +415,7 @@ end
 -- Emits events prior to and after replacing buffer text.
 M.connect(M.MODIFIED, function(position, mod, text, length)
   if mod & (DELETE | INSERT) == 0 or length ~= buffer.length then return end
-  if mod & (INSERT | UNDOREDO) > 0 then
+  if mod & (INSERT | UNDOREDO) == INSERT | UNDOREDO then
     -- Cannot emit BUFFER_AFTER_REPLACE_TEXT here because Scintilla will do things like update
     -- the selection afterwards, which could undo what event handlers do.
     events.connect(events.UPDATE_UI, emit_after_replace_text)

core/ui.lua

@@ -375,10 +375,7 @@ local function restore_buffer_state()
   view.x_offset = buffer._x_offset or 0
 end
 events.connect(events.BUFFER_AFTER_SWITCH, restore_buffer_state)
-events.connect(events.BUFFER_AFTER_REPLACE_TEXT, function()
-  local anchor, pos = buffer._anchor or 0, buffer._current_pos or 0
-  if anchor <= buffer.length and pos <= buffer.length then restore_buffer_state() end
-end)
+events.connect(events.BUFFER_AFTER_REPLACE_TEXT, restore_buffer_state)
 
 -- Updates titlebar and statusbar.
 local function update_bars()

test/test.lua

@@ -2144,7 +2144,7 @@ function test_editing_filter_through()
   textadept.editing.filter_through('sort')
   assert_equal(buffer:get_text(), '3|baz\n1|foo\n1|foo\n4|quux\n5|foobar\n2|bar\n')
   buffer:undo()
-  -- Test multiple selection.
+  -- Test rectangular selection.
   buffer:set_text('987654321\n123456789\n')
   buffer.rectangular_selection_anchor = 4
   buffer.rectangular_selection_caret = 17
@@ -2154,8 +2154,9 @@ function test_editing_filter_through()
   assert_equal(buffer.rectangular_selection_caret, 17)
   buffer:undo()
   assert_equal(buffer:get_text(), '987654321\n123456789\n')
-  -- Test rectangular selection.
+  -- Test multiple selection.
   buffer:set_text('foo\n\tfoo\n\t\tfoo\nfoo')
+  buffer:goto_pos(1)
   textadept.editing.select_word()
   textadept.editing.select_word()
   textadept.editing.select_word()