function fix( fixer ) {
			var replacement;
			var idx;
			var str;
			var ch;

			str = source.getText( comment );
			idx = str.search( /[a-zA-Z]/ );
			ch = str.charAt( idx ).toUpperCase();
			replacement = str.slice( 0, idx ) + ch + str.slice( idx+1 );
			return fixer.replaceText( comment, replacement );
		}
Fixes the lint error by capitalizing the first letter of a comment.

@private
@param {Function} fixer - ESLint fixer
@returns {(Object|null)} fix or null