Line continuation character: this symbol and the <return> immediately following
is ignored by Magma. Evaluation will continue on the next line without
interruption. This is useful for long input lines.
> // The following produces an error:
> x := 12
> 34;
User error: bad syntax
> /* but this is correct
> and reads two lines: */
> x := 12\
> 34;
> x;
1234