chore(vimdoc): Auto update

doc/outline.txt

@@ -1,4 +1,4 @@
-*outline.txt*             For NVIM v0.7.0            Last change: 2024 June 05
+*outline.txt*             For NVIM v0.7.0            Last change: 2024 July 05
 
 ==============================================================================
 Table of Contents                                  *outline-table-of-contents*
@@ -342,6 +342,10 @@ Show defaults ~
         -- You can use a custom function that returns the icon for each symbol kind.
         -- This function takes a kind (string) as parameter and should return an
         -- icon as string.
+        ---@param kind string
+        ---@param bufnr integer Code buffer
+        ---@returns string|boolean The icon string (key of `icons` table), or `false`
+        ---                        to fallback to `icon_source`.
         icon_fetcher = nil,
         -- 3rd party source for fetching icons. Fallback if icon_fetcher returned
         -- empty string. Currently supported values: 'lspkind'
@@ -782,6 +786,21 @@ TIPS                                                            *outline-tips*
     }
 <
 
+The `icon_fetcher` function may also accept a second parameter, the buffer
+number of the code buffer. For example, you can use it to determine the icon to
+use based on the filetype.
+
+>lua
+    symbols = {
+      icon_fetcher = function(kind, bufnr)
+        local ft = vim.api.nvim_buf_get_option(bufnr, 'ft')
+        -- ...
+      end,
+    }
+<
+
+See |outline-this-section| for other examples of this function.
+
 - You can customize the split command used for creating the outline window split
     using `outline_window.split_command`, such as `"topleft vsp"`. See |windows|
 - Is the outline window too slow when first opening a file? This is usually due
@@ -945,7 +964,7 @@ that simply returns in plain text, the first letter of the given kind.
 
 >lua
     symbols = {
-      icon_fetcher = function(kind) return kind:sub(1,1) end
+      icon_fetcher = function(kind, bufnr) return kind:sub(1,1) end,
     }
 <
 
@@ -954,13 +973,25 @@ and `icons` as fallback.
 
 
 
+DIFFERENT ICONS BASED ON FILETYPE ~
+
+>lua
+    symbols = {
+      icon_fetcher = function(kind, bufnr)
+        local ft = vim.api.nvim_buf_get_option(bufnr, 'ft')
+        -- ...
+      end,
+    }
+<
+
+
 DISABLE ICONS ~
 
 Disable all icons:
 
 >lua
     symbols = {
-      icon_fetcher = function(_) return "" end,
+      icon_fetcher = function() return "" end,
     }
 <
 
@@ -968,7 +999,7 @@ Disable icons for specific kinds, and for others use lspkind:
 
 >lua
     symbols = {
-      icon_fetcher = function(k)
+      icon_fetcher = function(k, buf)
         if k == 'String' then
           return ""
         end
@@ -980,6 +1011,25 @@ Disable icons for specific kinds, and for others use lspkind:
 
 
 
+DISABLE ICONS FOR A SPECIFIC FILETYPE ~
+
+In this example, icons are disabled for markdown, and `lspkind` is used for
+other filetypes.
+
+>lua
+    symbols = {
+      icon_fetcher = function(k, buf)
+        local ft = vim.api.nvim_buf_get_option(buf, "ft")
+        if ft == 'markdown' then
+          return ""
+        end
+        return false
+      end,
+      icon_source = "lspkind",
+    }
+<
+
+
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