#11 fix rlang-variable

.ace_identifier {
  color: $rlang-variable;
}
.ace_variable {
    color: $rlang-variable;
    &.ace_parameter {
        color: $rlang-value;
    }
}

`$rlang-variable` isn't being applied to the correct class... Currently it's applied to `.ace_variable` but that doesn't work. It should be applied to `.ace_identifier`, but this adds *a lot of color* so needs to be done thoughtfully. ```scss .ace_identifier { color: $rlang-variable; } .ace_variable { color: $rlang-variable; &.ace_parameter { color: $rlang-value; } } ```

Note that RStudio doesn't differentiate between function names and variables (identifiers)