File "formatfloat_testcases.txt" contains test cases for testing printf-like formatting of floats. The same data can be used for testing new-style formatting of floats (they give the same result) and float-style formatting of Fraction (added in 3.12).

cc @mdickinson

Linked PRs

• gh-109546: Add more tests for formatting floats and fractions #109548
• [3.12] gh-109546: Add more tests for formatting floats and fractions (GH-109548) #109557
• [3.11] gh-109546: Add more tests for formatting floats (GH-109548) #109685