function sectionText( file, section ) {
	var out = processors[ section ]( file ).contents;

	// Remove all comments:
	out = replace( out, /<!--[^->]+-->/g, '' );

	// Remove other special characters:
	out = replace( out, /[#*_\-=]/g, '' );

	// Convert any uppercase characters to lowercase:
	out = lowercase( out );

	// Remove punctuation:
	out = removePunctuation( out );

	// Remove leading and trailing whitespace:
	out = trim( out );

	return out;
}
Processes and returns the text of a README section.

@private
@param {string} file - file text
@param {string} section - section name
@returns {string} processed text