[bug #59262] Scheme line continuations are not handled correctly

[Bruno Haible]

Update of bug #59262 (group gettext):

                  Status:          Ready For Test => Fixed                  
             Assigned to:                  m1gu3l => haible                 
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #2:

Thanks for the report. As Miguel noted, Guile in its default configuration
does *not* discard spaces and tabs after backslash-newline, therefore xgettext
must keep a way to follow the Guile behaviour.

I chose to make a distinction between --language=Scheme and --language=Guile.
With --language=Scheme, xgettext assumes R6RS or R7RS behaviour; with
--language=Guile, it assumes Guile behaviour.

Implemented through
https://git.savannah.gnu.org/gitweb/?p=gettext.git;a=commitdiff;h=ee7dfc338f8ad53d416f7935a914d5cdf7bc5ed0
https://git.savannah.gnu.org/gitweb/?p=gettext.git;a=commitdiff;h=c3d3c5363c51ff43d5c13c6c6152d831c16fe942

Miguel, I did not take your patch because
  - I don't agree with introducing an xgettext option that augments the
--language handling. That's what the --language option is for.
  - It does not discard spaces and tabs between the backslash and the newline,
as required by R6RS and R7RS.
  - It does not enable R6RS compliant behaviour after #!r6rs.



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