refactor(lua): type annotations

runtime/lua/vim/snippet.lua

@@ -254,9 +254,10 @@ local function display_choices(tabstop)
   assert(tabstop.choices, 'Tabstop has no choices')
 
   local start_col = tabstop:get_range()[2] + 1
-  local matches = vim.iter.map(function(choice)
-    return { word = choice }
-  end, tabstop.choices)
+  local matches = {} --- @type table[]
+  for _, choice in ipairs(tabstop.choices) do
+    matches[#matches + 1] = { word = choice }
+  end
 
   vim.defer_fn(function()
     vim.fn.complete(start_col, matches)
@@ -449,7 +450,9 @@ function M.expand(input)
     local shiftwidth = vim.fn.shiftwidth()
     local curbuf = vim.api.nvim_get_current_buf()
     local expandtab = vim.bo[curbuf].expandtab
-    local lines = vim.iter.map(function(i, line)
+
+    local lines = {} --- @type string[]
+    for i, line in ipairs(text_to_lines(text)) do
       -- Replace tabs by spaces.
       if expandtab then
         line = line:gsub('\t', (' '):rep(shiftwidth)) --- @type string
@@ -459,8 +462,8 @@ function M.expand(input)
         line = #line ~= 0 and base_indent .. line
           or (expandtab and (' '):rep(shiftwidth) or '\t'):rep(vim.fn.indent('.') / shiftwidth + 1)
       end
-      return line
-    end, ipairs(text_to_lines(text)))
+      lines[#lines + 1] = line
+    end
 
     table.insert(snippet_text, table.concat(lines, '\n'))
   end