How do I convert files with toggle characters, like +this+, to look like [i]this[/i]?
Input files, especially message-oriented text files, often contain toggle characters for emphasis, like ~this~, this, or =this=. Sed can make the same input pattern produce alternating output each time it is encountered. Typical needs might be to generate HMTL codes or print codes for boldface, italic, or underscore.
