closes #1696

includes preprocessor changes
- Removed prefixing of doubles between -1 and 1 with 0.
- Fixed bug introduced in 985d742.
- macro processor: simplify handling of `@#define`

Needed for some runners, e.g. lupi

[skip ci]

There was not test for the conditional particle filter (CPF).

trap error when sub_draws is set to zero

See merge request !1699

rescale_prediction_error_covariance

See merge request Dynare/dynare!1698

In particular, in the case of an 'mcp' tag, this could lead to a convergence
failure.

Also modify the lmmpc/rbcii.mod test so that it fails if convergence is not
obtained, in order to detect such regressions earlier.

Closes: #1697

This preprocessor update also includes the following changes:
— removal of license.txt, now merged in back in the main Dynare one
– various code simplifications and modernizations in the macro processor
— minor code simplification in parsing of the --+ options: … +-- line

Fix minimal state space test files for old matlab

See merge request Dynare/dynare!1700

Follows from d3e90a8d.

Identification Toolbox: improvements, bugfixes, license, preparation for getting rid of globals

Closes #1694 and #1689

See merge request Dynare/dynare!1697

before issuing F singularity, check with rescaled F matrix: this spares lots of computing time when singularity only happens in the first KF step.

Get fields

Fix the handling of options nopreprocessoroutput, onlyjson and onlymacro when they appear at the top of the .mod file

The nopathchange is still not supported in this context, so document it.

Also recommend the whitespace-separated syntax instead of the comma-separated
syntax, since the latter is inconsistent with the way options are passed on the
command-line.

Closes: #1667

Ref. #1689

In particular, merge back preprocessor information.

Those had been incorrectly converted to GPL-3+ in commit
1bf81c9f.

Note that, for get_mean, the syntax with an optional order is not documented,
because the semantics is different at order 2, and it does not work for higher
orders.

Closes: #1687

[skip ci]

Closes issue #1679

[skip ci]

Closes: #1650

This is necessary for Octave under Windows, to avoid a warning about isdir()
triggered by user_has_octave_forge_package.m.

Ref. preprocessor#40

Also add a regression test.

Closes: preprocessor#40

The old option is left for backward-compatibility purposes, but it has the same
effect as the new one.

Closes: #1093

Ref. !1692