Add a heading for each example, and document the new cursor_char_value feature.

Status-line.md

@@ -42,7 +42,11 @@ DisplayLine mode_line() const override
 }
 ```
 
----
+# Examples
+
+Here's some simple things you might want to include in your status line.
+
+## The current date and time
 
 The modeline is regularly updated, so:
 
@@ -51,7 +55,15 @@ set global modelinefmt '%sh{date}'
 ```
 will display the current date with elapsing seconds.
 
-Display how many buffers are currently opened:
+## Codepoint of the character under the cursor
+
+Many Unicode characters are quite similar, and it can be difficult to tell at a glance whether the character you're looking at is (say) U+0027 APOSTROPHE or U+2019 RIGHT SINGLE QUOTE. If you display the codepoint of the character under the cursor in the status bar, even if you don't recognise the specific code-point, at least you've got a specific value you can look up.
+
+```
+set global modelinefmt 'U+%sh{printf "%04x" "$kak_cursor_char_value"}'
+```
+
+## How many buffers are currently open:
 
 ```
 set global modelinefmt '%sh{bs=${kak_buflist//[^:]};echo $((${#bs}+1))} buffers'
@@ -65,6 +77,8 @@ Explanation:
 }
 ```
 
+## Cursor position as a percentage of the whole file
+
 To show the [relative position of the cursor in percent](https://github.com/lenormf/kakoune-extra/blob/master/widgets/percent.kak) using `wc`:
 
 ```
@@ -86,6 +100,7 @@ hook global WinCreate .* %{
 }
 ```
 
+## Git branch integration
 
 Here's another [example by lenormf](https://github.com/mawww/kakoune/issues/657) on how to add more info to the modeline, like the current git branch (status bar)