doc: introduce lua-heredoc for configuring through viml

README.md

@@ -106,6 +106,21 @@ Lualine has sections as shown below.
 
 Each sections holds it's components e.g. current vim's mode.
 
+<details><summary>Configuring from `.vim` file</summary>
+
+All the examples below are in lua. You can use the same examples
+in `.vim` file by wrapping them in lua heredoc like this:
+
+```vim
+lua << END
+require'lualine'.setup()
+END
+```
+
+checkout `:help lua-heredoc`.
+
+</details>
+
 <details><summary>Default config</summary>
 
 ```lua

doc/lualine.txt

@@ -82,6 +82,20 @@ Lualine has sections as shown below.
 
 Each sections holds it’s components e.g. current vim’s mode.
 
+Configuring from `.vim` file
+
+All the examples below are in lua. You can use the same examples in `.vim` file
+by wrapping them in lua heredoc like this:
+
+>
+    lua << END
+    require'lualine'.setup()
+    END
+<
+
+
+checkout `:help lua-heredoc`.
+
 Default config
 
 >