lib/preprocessor.js
function blockWrap(contract, expression) {
  return contract.slice(0, expression.start) + '{' + contract.slice(expression.start, expression.end) + '}' + contract.slice(expression.end);
}
function blockWrap(contract, expression) {
  return contract.slice(0, expression.start) + '{' + contract.slice(expression.start, expression.end) + '}' + contract.slice(expression.end);
}
function blockWrap ( contract , expression ) { return contract . slice ( 0 , expression . start ) + '{' + contract . slice ( expression . start , expression . end ) + '}' + contract . slice ( expression . end ) ; }
Splices enclosing brackets into `contract` around `expression`;
@param  {String} contract solidity source
@param  {Object} node     AST node to bracket
@return {String}          contract
Splices enclosing brackets into contract around expression ;