Add support for untracked local snippets

.gitignore

@@ -1,3 +1,4 @@
 lazy-lock.json
 spell/*.spl
 local.lua
+snippets/local/

lua/plugins/snippets.lua

@@ -6,8 +6,14 @@ return {
     local luasnip = require('luasnip')
     luasnip.setup({})
 
-    -- Load snippets
-    local opts = { paths = vim.fn.stdpath('config') .. '/snippets' }
+    -- Load snippets. The 'snippets/local' directory is gitignored and holds
+    -- personal snippets that are not tracked; LuaSnip merges it with the
+    -- tracked snippets above.
+    local config_dir = vim.fn.stdpath('config')
+    local opts = { paths = {
+      config_dir .. '/snippets',
+      config_dir .. '/snippets/local',
+    } }
     require('luasnip.loaders.from_snipmate').lazy_load(opts)
     require('luasnip.loaders.from_lua').lazy_load(opts)
 

lua/plugins/treesitter.lua

@@ -1,3 +1,25 @@
+-- Fold markdown sections through the blank lines that trail them. The upstream
+-- query applies (#trim! @fold) to (section), which leaves the blank lines before
+-- the next heading outside the fold and pads every collapsed section with an
+-- empty line. Set explicitly rather than dropped in after/queries/, since only
+-- the first folds.scm found on the runtimepath is used as the base query and the
+-- one shipped with the parser wins that race.
+vim.treesitter.query.set('markdown', 'folds', [[
+([
+  (fenced_code_block)
+  (indented_code_block)
+  (list_item
+    (list))
+] @fold
+  (#trim! @fold))
+
+(section) @fold
+
+(section
+  (list) @fold
+  (#trim! @fold))
+]])
+
 local has_tree_sitter_cli = vim.fn.executable('tree-sitter') == 1
 
 if not has_tree_sitter_cli then