v0.3.0 broke dedent package

[lukasmalkmus]

Assume the following (in real life dynamically created) string:

Your bank accounts:

  DKB
    ✓ Logged in as jamesbond
  ING
    ✓ Logged in as jamesbond

The indentation is there for a reason. At one stage a special character is inserted to denote the selected bank account (if an account is actually selected):

Your bank accounts:

➜ DKB
    ✓ Logged in as jamesbond
  ING
    ✓ Logged in as jamesbond

Regardless if an account is selected or not, this is run through dedent.String() to get rid of the indentation of the first example above.

With v0.2.0 and v0.3.0, this works fine:

Your bank accounts:

DKB
  ✓ Logged in as jamesbond
ING
  ✓ Logged in as jamesbond

However, when the arrow is present as in the second example above, dedentation gets mangled with v0.3.0:

Your bank accounts:

➜DKB
  ✓ Logged in as jamesbond
ING
  ✓ Logged in as jamesbond

Not even the whitespace between the char and the next string is preserved.

To sum this up and give a working example, try the following code with v0.2.0 and v0.3.0:

const s = `Your bank accounts:

➜ DKB
    ✓ Logged in as jamesbond
  ING
    ✓ Logged in as jamesbond
`

fmt.Print(dedent.String(s))