tmp
fix antiquot bug
remove unnecessary  empty quote
improve left delimiters
(%****} ) should be lexed as '('   '%****' '}' ')'
handle comment correctly in quotation
add a symbol unit test
change build system to support test hot and cold simultaneously
split test files to reduce minimal dependency.
This means even part of the fan is broken, we could still test its non-broken part
now support partial test with phony..
remove check for the quotation ending
remove extra_quot seems to succeed
clean the stack trace
tweak
start up for testing lex
1. remove stack, clean up
2. unify dirquotation with quotation
simplify handle_quot
clean
clean up for expand_fun
clean a bit, ready for switch
lexer change, not finished yet
everything works fine except unitest