bash remove trailing whitespace from every line code example

Example 1: bash remove trailing whitespace from every line

# Basic syntax:
awk '{$1=$1};1' your_file

Example 2: how to remove every space in a string in bash

#!/bin/bash

#Make our variable
var="foo bar"

#Print it without the spaces
echo ${var//[[:blank:]]/}

#Output will be foobar