The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.6/static/sql-syntax-lexical.html
Description:
Postgresql 9.6, section 4.1.2.5 says that bit-strings can spill over
multiple lines, same as regular string constants. I tried SELECTing such and
found that they may only contain characters '0' and '1'.