[Cashtab] [p1 normalizeBalance fix] Remove extra spaces from cashMethods.test.js

Summary:
T2601

Part 1 in a series of diffs to improve calculation of wallet balance from utxo set.

prettier for whatever reason hasn't run on this file in some time. Some extra spaces auto-removed.

Test Plan: Confirm that changes are only formatting.

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D11843