Strip surrounding characters from text
# Arguments
- a_count : Count of characters to strip ( trimmed )
- a_content : Content to strip
# Demo
```
$static(screen_width,10)
$static(border_padding,2)
$repeat|($screen_width(),~)
$strip-($border_padding())
===
~~~~~~ % From 10 to 6
```
# Example
$assert(llo Wor,$strip(2,Hello World))