Revert token movement bindings

Comments by macOS users have shown that, apparently, on that platform
this isn't wanted.

The functions are there for people to use,
but we need more time to figure out if and how we're going to bind
these by default.
For example, we could change these bindings depending on the OS in future.

This reverts most of commit 6af96a81a8c6ff5e632d4dda7448f5f01d7a5d35.

Fixes #10926
See #11107

CHANGELOG.rst

@@ -16,6 +16,7 @@ Changes since 4.0b1
   the old behavior that leaves a "^C" marker is available as "cancel-commandline" (:issue:`10935`)
 - The ``make test`` target was removed as it can no longer be defined in new CMake versions. Use ``make fish_run_tests``.
   The built-in test target will run if you built fish before, but will not print output if it fails (:issue:`11116`).
+- :kbd:`alt-backspace`, :kdb:`alt-left` and :kbd:`alt-right` operate on words again instead of full arguments, reverting to how it was in 3.7 and before (:issue:`10926`).
 
 fish 4.0.0 (released ???)
 =========================

doc_src/interactive.rst

@@ -303,7 +303,7 @@ Some bindings are common across Emacs and vi mode, because they aren't text edit
 
 - :kbd:`alt-enter` inserts a newline at the cursor position. This is useful to add a line to a commandline that's already complete.
 
-- :kbd:`alt-left` (``←``) and :kbd:`alt-right` (``→``) move the cursor one argument left or right, or moves forward/backward in the directory history if the command line is empty. If the cursor is already at the end of the line, and an autosuggestion is available, :kbd:`alt-right` (``→``) (or :kbd:`alt-f`) accepts the first argument in the suggestion.
+- :kbd:`alt-left` (``←``) and :kbd:`alt-right` (``→``) move the cursor one word left or right (to the next space or punctuation mark), or moves forward/backward in the directory history if the command line is empty. If the cursor is already at the end of the line, and an autosuggestion is available, :kbd:`alt-right` (``→``) (or :kbd:`alt-f`) accepts the first word in the suggestion.
 
 - :kbd:`ctrl-left` (``←``) and :kbd:`ctrl-right` (``→``) move the cursor one word left or right. These accept one word of the autosuggestion - the part they'd move over.
 
@@ -368,7 +368,7 @@ To enable emacs mode, use :doc:`fish_default_key_bindings <cmds/fish_default_key
 
 - :kbd:`delete` or :kbd:`backspace` or :kbd:`ctrl-h` removes one character forwards or backwards respectively.
 
-- :kbd:`ctrl-backspace` removes one word backwards and :kbd:`alt-backspace` removes one argument backwards.
+- :kbd:`alt-backspace` removes one word backwards. If supported by the terminal, :kbd:`ctrl-backspace` does the same.
 
 - :kbd:`alt-<` moves to the beginning of the commandline, :kbd:`alt->` moves to the end.
 

share/functions/__fish_shared_key_bindings.fish

@@ -54,8 +54,8 @@ function __fish_shared_key_bindings -d "Bindings shared between emacs and vi mod
     $legacy_bind --preset $argv -k sright forward-bigword
     $legacy_bind --preset $argv -k sleft backward-bigword
 
-    bind --preset $argv alt-right nextd-or-forward-token
-    bind --preset $argv alt-left prevd-or-backward-token
+    bind --preset $argv alt-right nextd-or-forward-word
+    bind --preset $argv alt-left prevd-or-backward-word
 
     bind --preset $argv alt-up history-token-search-backward
     bind --preset $argv alt-down history-token-search-forward

share/functions/fish_default_key_bindings.fish

@@ -57,9 +57,8 @@ function fish_default_key_bindings -d "emacs-like key binds"
     bind --preset $argv alt-u upcase-word
 
     bind --preset $argv alt-c capitalize-word
-    bind --preset $argv alt-backspace backward-kill-token
+    bind --preset $argv alt-backspace backward-kill-word
     bind --preset $argv ctrl-backspace backward-kill-word
-    bind --preset $argv alt-delete kill-token
     bind --preset $argv ctrl-delete kill-word
     bind --preset $argv alt-b backward-word
     bind --preset $argv alt-f forward-word