handler for unbalanced at end
BracketParseException
addSourceCodeErrorInfo
lexer record methods
sketch out token recording
RecordedTokens creating dom
unbalanced open/closed showing
remove tracing, adjust green
showing unexpected ]
Fix indents & unexpected ] message
explanations of closing bracket error examples
pluralisation of unbalanced open bracket numbers
Error example with "]" at end
tooltips for unexpected and unbalanced brackets