!7

p-exp {
  assertEqualsVerbose(litmap("$bla", "hello"), matchDollarVarsIC_underscores("$bla", "hello"));
  assertEqualsVerbose(null, matchDollarVarsIC_underscores("$bla", "hello you"));
  assertEqualsVerbose(litmap("$bla_bla", "hello you"), matchDollarVarsIC_underscores("$bla_bla", "hello you"));
  assertEqualsVerbose(null, matchDollarVarsIC_underscores("$bla_bla", "hello"));
}