Release 0.9.7 "Home" - Symbolic integration and bug fixes

[c3d]

This release focuses on symbolic integration and bug fixes.

New features

• Symbolic evaluation of integrals when the primitive is known, for example '∫(A;B;X↑3-sin(X-3);X)' now evaluates symbolically.
• hms: Cycle between hms and dms units
• datetime: _hms removes _dms if necessary
• Non-algebraic form of where, with list as substitution input, for example « 'X-Y·Z' { X 3 Y '2·A' } | » returns '3-2·A·Z'.

Bug fixes

• Correctly render * and < in the built-in help render engine.
• Optimized temporaries cleanup now correctly clears the command if temporary.
• Fix rounding errors for decimal values in HMS and DMS
• Do not give truncated result for FromHMS
• Fix conversion of hardware floating-point values to fraction
• Fix typo in FromHMS help entry
• Allow screenshots with Shift-Disp in Show
• Fix two tests that fail and should not
• Correct hwfp entry with french locale.
• stack: Correct font size for non-result stack levels
• Swap logfit and powerfit menu entries (wrong label)

Improvements

• Improve detection of unknown primitives and derivatives.
• The rewrite engine was incorrectly rewriting "up" for integration and differentiation, when rewriting "down" is much more efficient. This accelerates symbolic integration and differentiation by more than an order of magnitude in some cases.
• Evaluate the bounds of integrals numerically ahead of time. This accelerates numerical integration when the bounds are complex expressions.
• In the rewrite engine, evaluate the sub-expressions that correspond to a constant in the pattern before comparing. This notably solves some cases where the derivative would contain leftover constants expressions that should have been eliminated, such as 0*X.
• Automatically generate the list of implemented commands, and update the implementation status.
• Renamed the settings for numerical / symbolic integration and solver
• Rename 6-Unimplemented.md to 6-ImplementationStatus.md and remove empty doc/calc-help/finances.md file.
• Support for recent compilers (GCC >= 12.2.1).
• Update performance data for 0.9.6
• Add Philippe Martens to the authors list

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