Delete Leading Spaces using Sed
sed -e 's/^[ ]*//'
Delete Leading Spaces and Tabs (White Space) using Sed
sed -e 's/^[\t ]*//'
Delete Trailing Spaces using Sed
sed -e 's/[ ]*$//'
Delete Trailing Spaces and Tabs (White Space) using Sed
sed -e 's/[\t ]*$//'
Convert all Tabs to Spaces (The Bonus)
tr '\011' '\040'