testing: Better support for Unicode and whitespace characters (#181)
testing: Better support for Unicode and white space characters
Unicode characters can be placed in tests as regular characters.
However, due to editors/IDEs sometimes handling white space in different
ways you can add a placeholder for a specific Unicode point using
`<U+####>`.
This will be replaced with the correct character before the test runs.
This is only a feature of SQL Tests, so will not work in any other
context.
The SQL standard names specific white space characters that must be
valid separators, we already supported this but now they are codified
into tests using the new syntax above.
