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Version update and URL fix.

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- Update to version 3.0.1:
  * New `@double` numerical functions; these are wrappers around SymPy,
    so they are slower than native floating-point implementations.
    - adjoint
  * Misc bug fixes and improvements in error handling.
  * `.oct-config` files indicate source is UTF-8 encoded and should improve
    any locale or encoding problems on Octave 7 and above.
  * Fixes some errors when Python is running in Cygwin-like environment.
    But there could still be errors in other places (issue #1182).

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- Update to version 3.0.0:
- Update required versions of dependencies python3-sympy and octave in keeping with upstream.

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- Update to version 2.9.0:
  * Default python interpreter is now `python3`.
  * Fixes for SymPy 1.5.
    + `@sym/round` changed to round-to-even.
    + fix broken EmptySet `finiteset()`.
  * Documentation updates for upcoming Octave 6.
  * If the Pythonic package is loaded, automatically use it for
    Python communication (see `help sympref` for details).
  * Deprecation notice: `python_cmd` will be removed in a future
    release.
- Switch to python3, drop python*-devel build dependency

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- Update to version 2.8.0:
  * New symbolic commands: eval ezmesh find sinc
  * Update minimum versions of SymPy to 1.2 and Octave to 4.2.
  * Fixes for SymPy 1.4.
  * Newer SymPy versions improve QR and LU on non-square matrices.
  * Support for expressions with min and max such as `min(x, y)`.
  * `subs(f)` now works: it finds values from the workspace.
  * `gammainc` now regularized correctly.
  * `lambertw` has more consistent printing.
  * Other bug fixes and documentation updates.
- Update version numbers for python-sympy and octave-cli for
  Requires and BuildRequires in keeping with upstream.

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- Update to version 2.7.1:
  * New symbolic command: numdem
  * Fixes for SymPy 1.3.
  * Various bug fixes and documentation updates.

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- Update to version 2.7.0:
  * New symbolic commands: arg, euler, ezcontour
  * New `@double` numerical functions; these are wrappers around
    SymPy, so they are slower than native floating-point
    implementations: bernoulli, euler, chebyshevT, pochhammer,
    chebyshevU.
  * The initial startup is much quieter!
  * `vpa` now warns of low-precision on non-numbers strings with
    decimals such as `vpa('cos(0.1)')`. See "help vpa" for
    details.
  * `subs` allows multiple scalar variables to be replaced with
    symbolic matrix expressions.
  * symfun can be evaluated at symbolic matrices: `f(sym([1 2; 3
    4]))` now works where `f(x)` is a symfun.
  * Fixes for symfuns such as `syms N(t)` where the function name
    conflicts with a SymPy command.
  * Fixes for how assumptions interact with symfuns.
  * New command `sympref diagnose` to help debug Python/SymPy
    issues.
  * Improve `function_handle` support by supporting more
    functions.
  * Fixes for several bugs mentioning "immutable matrices".
  * `bernoulli` now works with array inputs.
  * Added a `private/defaultpython.m` to make it easier for
    distributors to control which python interpreter is used by
    default.
  * Fixes for GNU Octave 4.4.
  * Fixes for SymPy 1.2.
  * Various bug fixes and documentation updates.

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- Update to version 2.6.0
  * New symbolic commands: ellipke, ellipticCE, ellipticCK,
    ellipticCPi, ellipticE, ellipticF, ellipticK, ellipticPi,
    harmonic, kroneckerDelta, pochhammer
  * New `@double` numerical functions; these are wrappers around
    SymPy, so they are slower than native floating-point
    implementations: harmonic.
  * Support for the new SymPy 1.1.1.
  * `solve` now supports vectors of equations and vectors of
    variables.
  * Better warning for `sym(0.1)`, updated docs about floating
    point.
  * Double values can now be converted to their exact rational
    value using `sym(0.1, 'f')`.  Passing `'r'` gives the current
    heuristic behaviour.  Neither raises a warning.
  * The default floating-point heuristics now check for square
    roots of integers, so `sym(sqrt(2))` should work.
  * `sym('i')` and `sym('I')` no longer create the imaginary unit:
    use `sym(i)` or `sym(1i)`.
  * `sym(e)` now gives the same as `exp(sym(1))`.  However,
    `sym('e')` and `syms e` continue to create a variable named
    `e`.
  * `sym` now accepts function handles such as anonymous functions
    as inputs.
  * `subs` is not approriate for numerical evaluation; add an
    example in `help subs` which shows how to do this with
    `function_handle`.
  * Calling `sym(cell)` now creates a sym array instead of a cell
    array. Old behaviour of creating a cell array was deprecated
    in 2.5.0.

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baserev update by copy to link target

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- Update to version 2.2.4
  * Bigfix release

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