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	docs: document breaking change for nvim_create_autocmd callback (#27484)
https://github.com/neovim/neovim/pull/27428 changed the semantics of callbacks passed to nvim_create_autocmd such that any truthy value will delete the autocommand (rather than just the literal boolean value `true`). Update the documentation accordingly and add an entry to `news.txt`. The behavior is now consistent between nvim_create_autocmd and nvim_buf_attach.
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		| @@ -2099,8 +2099,9 @@ nvim_buf_attach({buffer}, {send_buffer}, {*opts})          *nvim_buf_attach()* | ||||
|                        will be `nvim_buf_changedtick_event`. Not for Lua | ||||
|                        callbacks. | ||||
|       • {opts}         Optional parameters. | ||||
|                        • on_lines: Lua callback invoked on change. Return `true` to | ||||
|                          detach. Args: | ||||
|                        • on_lines: Lua callback invoked on change. Return a | ||||
|                          truthy value (not `false` or `nil`) | ||||
|                          to detach. Args: | ||||
|                          • the string "lines" | ||||
|                          • buffer handle | ||||
|                          • b:changedtick | ||||
| @@ -2113,7 +2114,8 @@ nvim_buf_attach({buffer}, {send_buffer}, {*opts})          *nvim_buf_attach()* | ||||
|  | ||||
|                        • on_bytes: Lua callback invoked on change. This | ||||
|                          callback receives more granular information about the | ||||
|                          change compared to on_lines. Return `true` to | ||||
|                          change compared to on_lines. Return a truthy value | ||||
|                          (not `false` or `nil`) to | ||||
|                          detach. Args: | ||||
|                          • the string "bytes" | ||||
|                          • buffer handle | ||||
| @@ -3457,9 +3459,9 @@ nvim_create_autocmd({event}, {*opts})                  *nvim_create_autocmd()* | ||||
|                    troubleshooting). | ||||
|                  • callback (function|string) optional: Lua function (or | ||||
|                    Vimscript function name, if string) called when the | ||||
|                    event(s) is triggered. Lua callback can return true to | ||||
|                    delete the autocommand, and receives a table argument with | ||||
|                    these keys: | ||||
|                    event(s) is triggered. Lua callback can return a truthy | ||||
|                    value (not `false` or `nil`) to delete the | ||||
|                    autocommand. Receives a table argument with these keys: | ||||
|                    • id: (number) autocommand id | ||||
|                    • event: (string) name of the triggered event | ||||
|                      |autocmd-events| | ||||
|   | ||||
| @@ -122,6 +122,9 @@ The following changes may require adaptations in user config or plugins. | ||||
|  | ||||
| • |shm-q| now fully hides macro recording message instead of only shortening it. | ||||
|  | ||||
| • Returning any truthy value from a callback passed to |nvim_create_autocmd()| | ||||
|   (rather than just `true`) will delete the autocommand. | ||||
|  | ||||
| ============================================================================== | ||||
| BREAKING CHANGES IN HEAD                                    *news-breaking-dev* | ||||
|  | ||||
|   | ||||
							
								
								
									
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							| @@ -155,8 +155,9 @@ function vim.api.nvim_buf_add_highlight(buffer, ns_id, hl_group, line, col_start | ||||
| ---                    will be `nvim_buf_changedtick_event`. Not for Lua | ||||
| ---                    callbacks. | ||||
| --- @param opts vim.api.keyset.buf_attach Optional parameters. | ||||
| ---                    • on_lines: Lua callback invoked on change. Return `true` to | ||||
| ---                      detach. Args: | ||||
| ---                    • on_lines: Lua callback invoked on change. Return a | ||||
| ---                      truthy value (not `false` or `nil`) | ||||
| ---                      to detach. Args: | ||||
| ---                      • the string "lines" | ||||
| ---                      • buffer handle | ||||
| ---                      • b:changedtick | ||||
| @@ -169,7 +170,8 @@ function vim.api.nvim_buf_add_highlight(buffer, ns_id, hl_group, line, col_start | ||||
| --- | ||||
| ---                    • on_bytes: Lua callback invoked on change. This | ||||
| ---                      callback receives more granular information about the | ||||
| ---                      change compared to on_lines. Return `true` to | ||||
| ---                      change compared to on_lines. Return a truthy value | ||||
| ---                      (not `false` or `nil`) to | ||||
| ---                      detach. Args: | ||||
| ---                      • the string "bytes" | ||||
| ---                      • buffer handle | ||||
| @@ -863,9 +865,9 @@ function vim.api.nvim_create_augroup(name, opts) end | ||||
| ---                troubleshooting). | ||||
| ---              • callback (function|string) optional: Lua function (or | ||||
| ---                Vimscript function name, if string) called when the | ||||
| ---                event(s) is triggered. Lua callback can return true to | ||||
| ---                delete the autocommand, and receives a table argument with | ||||
| ---                these keys: | ||||
| ---                event(s) is triggered. Lua callback can return a truthy | ||||
| ---                value (not `false` or `nil`) to delete the | ||||
| ---                autocommand. Receives a table argument with these keys: | ||||
| ---                • id: (number) autocommand id | ||||
| ---                • event: (string) name of the triggered event | ||||
| ---                  `autocmd-events` | ||||
|   | ||||
| @@ -378,8 +378,9 @@ cleanup: | ||||
| ///             |autocmd-buflocal|. Cannot be used with {pattern}. | ||||
| ///             - desc (string) optional: description (for documentation and troubleshooting). | ||||
| ///             - callback (function|string) optional: Lua function (or Vimscript function name, if | ||||
| ///             string) called when the event(s) is triggered. Lua callback can return true to | ||||
| ///             delete the autocommand, and receives a table argument with these keys: | ||||
| ///             string) called when the event(s) is triggered. Lua callback can return a truthy | ||||
| ///             value (not `false` or `nil`) to delete the autocommand. Receives a table argument | ||||
| ///             with these keys: | ||||
| ///                 - id: (number) autocommand id | ||||
| ///                 - event: (string) name of the triggered event |autocmd-events| | ||||
| ///                 - group: (number|nil) autocommand group id, if any | ||||
|   | ||||
| @@ -112,7 +112,7 @@ Integer nvim_buf_line_count(Buffer buffer, Error *err) | ||||
| ///        Not for Lua callbacks. | ||||
| /// @param  opts  Optional parameters. | ||||
| ///             - on_lines: Lua callback invoked on change. | ||||
| ///               Return `true` to detach. Args: | ||||
| ///               Return a truthy value (not `false` or `nil`) to detach. Args: | ||||
| ///               - the string "lines" | ||||
| ///               - buffer handle | ||||
| ///               - b:changedtick | ||||
| @@ -125,8 +125,7 @@ Integer nvim_buf_line_count(Buffer buffer, Error *err) | ||||
| ///             - on_bytes: Lua callback invoked on change. | ||||
| ///               This callback receives more granular information about the | ||||
| ///               change compared to on_lines. | ||||
| ///               Return `true` to detach. | ||||
| ///               Args: | ||||
| ///               Return a truthy value (not `false` or `nil`) to detach. Args: | ||||
| ///               - the string "bytes" | ||||
| ///               - buffer handle | ||||
| ///               - b:changedtick | ||||
|   | ||||
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