4.2.73 ‘-\’: Explicitly escape continued strings

In FWEB, long strings are continued with the backslash. Normally, the continuation of the string must start in the first column of the next line; otherwise, spurious blanks will be introduced. However, when the ‘-\’ option is in effect, FWEB expects that the continuation will also begin with the backslash, and it will ignore leading white space and the backslash. (This feature was inspired by FORTRAN-90.) Thus, in the example

"This is \
      \continued";

the effective string is "This is continued" when ‘-\’ is in effect.

Note that this option affects all strings in the source file; one cannot mix and match.