--no-firsth1 puts 'undefined' in front and end "%" of TOC output

[skywinder]

markdown-toc --no-firsth1 README.md
here is file to test:
https://github.com/matterinc/web3swift/blob/develop/README.md

--no-firsth1 puts 'undefined' in front and end "%" of TOC output #131

Expected result:

web3swift

• Features:

• Design decisions
• Example
• Installation
  • Requirements
  • CocoaPods
• Getting started
  • Create Account
  • Save keystore to the memory
  • Initializing Ethereum address
  • Setting options
  • Encoding Transaction
  • Signing Transaction
  • Getting ETH balance
  • Getting gas price
  • Sending ETH
  • ERC20 Iteraction:
    • Getting ERC20 token balance
    • Sending ERC20
• Apps using this library
• Plans
  • Extra features:
• Stay in touch
  • Contribution
  • Communication
  • Special thanks to
• Authors
• License

Actual result:

undefined web3swift

• Features:

• Design decisions
• Example
• Installation
  • Requirements
  • CocoaPods
• Getting started
  • Create Account
  • Save keystore to the memory
  • Initializing Ethereum address
  • Setting options
  • Encoding Transaction
  • Signing Transaction
  • Getting ETH balance
  • Getting gas price
  • Sending ETH
  • ERC20 Iteraction:
    • Getting ERC20 token balance
    • Sending ERC20
• Apps using this library
• Plans
  • Extra features:
• Stay in touch
  • Contribution
  • Communication
  • Special thanks to
• Authors
• License%

[rendaw]

Dupe of #42 ?

[bas080]

A smaller failing case. Might be handy to triangulate the problem.

$ markdown-toc --no-firsth1 - <<< '## Heading'
$