chore: ✏️ condense long code comments

Trim the plugin and test file headers and the MarkdownEmoji comment to
five lines or fewer.

https://claude.ai/code/session_01Qea1JoBqVXi6R8Fw3QWCr7

Author: claude

src/components/blocks/markdown_block.tsx

@@ -8,11 +8,9 @@ type MarkdownBlockProps = {
   data: MarkdownBlock;
 };
 
-// Renders the placeholder element emitted by remarkSlackEmoji through the same
-// <SlackEmoji> component the mrkdwn parser uses, so the `markdown` block honors
-// custom emoji (`hooks.emoji`), standard emoji, aliases and skin tones exactly
-// like every other block type. The emoji name is read from the hast node's
-// properties (set via `hProperties` in the remark plugin).
+// Renders the placeholder emitted by remarkSlackEmoji through the same
+// <SlackEmoji> component the mrkdwn parser uses (so custom/standard/alias/
+// skin-tone emoji match). The emoji name comes from the hast node properties.
 const MarkdownEmoji = ({ node }: { node?: { properties?: { name?: unknown } } }) => {
   const name = typeof node?.properties?.name === "string" ? node.properties.name : "";
   return <SlackEmoji element={{ type: "slack_emoji", value: name }} />;

src/utils/remark_slack_emoji.ts

@@ -1,19 +1,8 @@
-// A remark (mdast) plugin used only by the `markdown` block.
-//
-// Every other block type renders through the library's mrkdwn parser
-// (utils/markdown_parser), which has a `slack_emoji` tokenizer rule. The
-// `markdown` block instead renders through react-markdown + remark-gfm, and that
-// pipeline has no emoji rule — so `:shortcode:` would otherwise show up as
-// literal text. This plugin splits mdast text nodes on `:shortcode:` and emits
-// placeholder elements (tag name `SLACK_EMOJI_TAG`) that markdown_block.tsx maps
-// back to the SAME <SlackEmoji> component the mrkdwn parser uses. Reusing that
-// component means custom emoji (consumer `hooks.emoji`), standard emoji
-// (shortcode -> unicode / node-emoji), aliases and skin tones all behave
-// identically across every block type, with no divergent logic.
-//
-// `code` (fenced) and `inlineCode` are literal mdast nodes whose content lives
-// in `value`, not in child `text` nodes, so they are never split here — Slack
-// does not interpolate emoji inside code, and neither do we.
+// remark/mdast plugin for the `markdown` block (react-markdown + remark-gfm),
+// which — unlike every other block type — has no emoji rule. It splits text
+// nodes on `:shortcode:` into `SLACK_EMOJI_TAG` placeholders that markdown_block
+// renders via the same <SlackEmoji> component the mrkdwn parser uses, so custom,
+// standard, alias and skin-tone emoji all match. Code spans/blocks are never split.
 
 // Tag name emitted into the hast tree via `data.hName`. markdown_block.tsx maps
 // this through react-markdown's `components` prop.

test/markdown_emoji.test.mjs

@@ -1,15 +1,8 @@
-// Emoji interpolation in the `markdown` block.
-//
-// The `markdown` block renders through react-markdown + remark-gfm (unlike every
-// other block type, which uses the mrkdwn parser). It previously had no emoji
-// rule, so `:shortcode:` rendered as literal text. These tests lock in that the
-// markdown block now interpolates emoji identically to the mrkdwn blocks —
-// standard, aliases, skin tones, and custom emoji via `hooks.emoji` — while
-// leaving code spans untouched.
-//
-// They run against the built package (dist/) so no test framework / transform
-// is needed: just Node's built-in runner + react-dom/server. CI builds before
-// running tests.
+// Emoji interpolation in the `markdown` block — it renders through react-markdown
+// (not the mrkdwn parser) and previously showed `:shortcode:` as literal text.
+// These lock in parity with mrkdwn blocks: standard, aliases, skin tones, custom
+// emoji via hooks, and code-span exclusion. Run against the built dist/ via Node's
+// built-in runner (no test framework needed); CI builds before testing.
 
 import test from "node:test";
 import assert from "node:assert/strict";