Fix address validation for whitespace after comma #4253
Merged
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Typical comma separated values have a space after each comma in order to make the list more human-readable. In some areas of bisq, comma separated lists are generated this way (see #4203), but the validation of comma separated addresses was not accepting spaces after commas. This change to the regex allows optional whitespace after comma separators. A new test has been added to validate the scenario of whitespace after comma.
Fixes #4203
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