Remove extra word in comment (#185)

lib/livebook/live_markdown.ex

@@ -16,9 +16,9 @@ defmodule Livebook.LiveMarkdown do
   # 3. Every Elixir code block maps to an Elixir cell.
   # 4. Adjacent regular Markdown text maps to a Markdown cell.
   # 5. Comments of the form `<!-- livebook:json_object -->` hold metadata
-  #    any apply to the element they directly precede (e.g. an Elixir cell).
+  #    and apply to the element they directly precede (e.g. an Elixir cell).
   #    Such comments may appear anywhere, for instance `<!-- livebook:{"force_markdown":true} -->`
-  #    forces the next Markdown block to be treated as prat of Markdown cell (even if it's Elixir code block).
+  #    forces the next Markdown block to be treated as part of Markdown cell (even if it's Elixir code block).
   #
   # ## Example
   #

lib/livebook_web/live/session_live/cell_component.ex

@@ -165,7 +165,7 @@ defmodule LivebookWeb.SessionLive.CellComponent do
 
   # The whole page has to load and then hooks are mounded.
   # There may be a tiny delay before the markdown is rendered
-  # or and editors are mounted, so show neat placeholders immediately.
+  # or editors are mounted, so show neat placeholders immediately.
 
   defp render_markdown_content_placeholder(empty: true) do
     assigns = %{}