Fix arguments order in error message

[sigmundch]

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[hoppipolla-critic-bot]

Critic review: https://critic.hoppipolla.co.uk/r/844

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[gsnedders]

@sigmundch Given dicts have no order, how is there any issue here?

[sigmundch]

Note that this swaps which key is associated with each value (e.g. expectedName should be node.name rather than body). So if you have:

<div></span>

The error used to say:
Unexpected end tag (div). Missing end tag (span).

Now the error will say:
Unexpected end tag (span). Missing end tag (div).

[gsnedders]

Oh. I can't read. Duh. :)

[gsnedders]

rebased & landed as 3ebdd8b