vim-patch:ae62fe5: runtime(doc): 'filetype', 'syntax' and 'keymap' only allow alphanumeric + some characters (#30630)

closes: vim/vim#15783

ae62fe5c28

Co-authored-by: Milly <milly.ca@gmail.com>

runtime/lua/vim/_meta/options.lua

@@ -2218,7 +2218,7 @@ vim.go.fic = vim.go.fileignorecase
 --- ```
 --- `FileType` `filetypes`
 --- When a dot appears in the value then this separates two filetype
---- names.  Example: >c
+--- names, it should therefore not be used for a filetype.  Example: >c
 --- 	/* vim: set filetype=c.doxygen : */
 --- ```
 --- This will use the "c" filetype first, then the "doxygen" filetype.
@@ -2226,7 +2226,7 @@ vim.go.fic = vim.go.fileignorecase
 --- one dot may appear.
 --- This option is not copied to another buffer, independent of the 's' or
 --- 'S' flag in 'cpoptions'.
---- Only normal file name characters can be used, `/\*?[|<>` are illegal.
+--- Only alphanumeric characters, '-' and '_' can be used.
 ---
 --- @type string
 vim.o.filetype = ""
@@ -3604,7 +3604,7 @@ vim.go.jop = vim.go.jumpoptions
 --- Setting this option to a valid keymap name has the side effect of
 --- setting 'iminsert' to one, so that the keymap becomes effective.
 --- 'imsearch' is also set to one, unless it was -1
---- Only normal file name characters can be used, `/\*?[|<>` are illegal.
+--- Only alphanumeric characters, '.', '-' and '_' can be used.
 ---
 --- @type string
 vim.o.keymap = ""
@@ -6874,7 +6874,7 @@ vim.bo.smc = vim.bo.synmaxcol
 --- Syntax autocommand event is triggered with the value as argument.
 --- This option is not copied to another buffer, independent of the 's' or
 --- 'S' flag in 'cpoptions'.
---- Only normal file name characters can be used, `/\*?[|<>` are illegal.
+--- Only alphanumeric characters, '.', '-' and '_' can be used.
 ---
 --- @type string
 vim.o.syntax = ""