Backticks not handled properly in AS clause with spaces

[smgallo]

When using backticks to escape an AS clause containing spaces, the syntax hilighting is not handled properly. For example, with no spaces hilighting is as expected:

SELECT
    protocol_no AS `ProtocolNo`,
    principal_investigator AS `PrincipalInvestigator`,
    funding
FROM study;

But when the escaped string contains a space it breaks the syntax hilighting:

SELECT
    protocol_no AS `Protocol No`,
    principal_investigator AS `Principal Investigator`,
    funding
FROM study;

[alex391]

Also fails on single quotes used to escape spaces

[benhamel2]

It also breaks with backslash single quote