fix off-by-one rejecting trailing nan/infinity in parseNumber

[dxbjavid]

CompositeFormat.parseNumber checks endIndex < source.length() before matching a special value like (NaN) or (Infinity), so a special-value token that runs to the final character of the input is never recognised. This breaks the format/parse round trip for a real-only NaN or infinity in ComplexFormat, where parse throws MathParseException on the very string format produced. Widening the comparison to endIndex <= source.length() lets a special value ending the input parse, which also covers RealVectorFormat and RealMatrixFormat as they share the same helper.

[aherbert]

This should test the round-trip:

Assert.assertEquals(positive, complexFormat.parse(complexFormat.format(positive)));
Assert.assertEquals(negative, complexFormat.parse(complexFormat.format(negative)));

Parsing should also test special values in the imaginary part:

Complex.ofCartesian(1.23, Double.NaN);
Complex.ofCartesian(1.23, Double.POSITIVE_INFINITY);
Complex.ofCartesian(1.23, Double.NEGATIVE_INFINITY);

[dxbjavid]

Done. The infinity test now checks the round trip for both signs, and I added testParseImaginarySpecialValue covering NaN, +Infinity and -Infinity in the imaginary part (parsed back from format output). All pass with the patch.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.15%. Comparing base (f554608) to head (e0bee2b).
⚠️ Report is 323 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #326      +/-   ##
============================================
+ Coverage     86.54%   87.15%   +0.61%     
+ Complexity     9787       89    -9698     
============================================
  Files           532      499      -33     
  Lines         35516    33463    -2053     
  Branches       6194     5833     -361     
============================================
- Hits          30738    29166    -1572     
+ Misses         3518     3174     -344     
+ Partials       1260     1123     -137     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.