fix(keymap): add fallback action to <C-y> mapping

Add missing fallback to preserve the default behavior.
See :h i_CTRL-Y and :h complete_CTRL-Y

Author: soifou

doc/configuration/keymap.md

@@ -92,7 +92,7 @@ Set the preset to `'none'` to disable the presets
 ```lua
 ['<C-space>'] = { 'show', 'show_documentation', 'hide_documentation' },
 ['<C-e>'] = { 'hide', 'fallback' },
-['<C-y>'] = { 'select_and_accept' },
+['<C-y>'] = { 'select_and_accept', 'fallback' },
 
 ['<Up>'] = { 'select_prev', 'fallback' },
 ['<Down>'] = { 'select_next', 'fallback' },

doc/modes/cmdline.md

@@ -43,7 +43,7 @@ Set via `cmdline.keymap.preset = 'cmdline'`, which is the default. Set to `'none
   ['<Right>'] = { 'select_next', 'fallback' },
   ['<Left>'] = { 'select_prev', 'fallback' },
 
-  ['<C-y>'] = { 'select_and_accept' },
+  ['<C-y>'] = { 'select_and_accept', 'fallback' },
   ['<C-e>'] = { 'cancel', 'fallback' },
 }
 ```

lua/blink/cmp/config/keymap.lua

@@ -34,7 +34,7 @@
 --- {
 ---   ['<C-space>'] = { 'show', 'show_documentation', 'hide_documentation' },
 ---   ['<C-e>'] = { 'cancel', 'fallback' },
----   ['<C-y>'] = { 'select_and_accept' },
+---   ['<C-y>'] = { 'select_and_accept', 'fallback' },
 ---
 ---   ['<Up>'] = { 'select_prev', 'fallback' },
 ---   ['<Down>'] = { 'select_next', 'fallback' },
@@ -61,7 +61,7 @@
 ---   ['<C-n>'] = { 'select_next' },
 ---   ['<C-p>'] = { 'select_prev' },
 ---
----   ['<C-y>'] = { 'select_and_accept' },
+---   ['<C-y>'] = { 'select_and_accept', 'fallback' },
 ---   ['<C-e>'] = { 'cancel', 'fallback' },
 --- }
 --- ```

lua/blink/cmp/keymap/presets.lua

@@ -7,7 +7,7 @@ local presets_keymaps = {
   default = {
     ['<C-space>'] = { 'show', 'show_documentation', 'hide_documentation' },
     ['<C-e>'] = { 'cancel', 'fallback' },
-    ['<C-y>'] = { 'select_and_accept' },
+    ['<C-y>'] = { 'select_and_accept', 'fallback' },
 
     ['<Up>'] = { 'select_prev', 'fallback' },
     ['<Down>'] = { 'select_next', 'fallback' },
@@ -34,7 +34,7 @@ local presets_keymaps = {
     ['<Right>'] = { 'select_next', 'fallback' },
     ['<Left>'] = { 'select_prev', 'fallback' },
 
-    ['<C-y>'] = { 'select_and_accept' },
+    ['<C-y>'] = { 'select_and_accept', 'fallback' },
     ['<C-e>'] = { 'cancel', 'fallback' },
     ['<End>'] = { 'hide', 'fallback' },
   },