dotemacs/tests/test-custom-whitespace-collapse.el, branch performance

dotemacs/tests/test-custom-whitespace-collapse.el, branch performance My Emacs configuration https://git.cjennings.net/dotemacs/atom?h=performance 2025-10-27T01:48:20+00:00 test+refactor:custom-whitespace: add comprehensive testing with 73 tests 2025-10-27T01:48:20+00:00 Craig Jennings c@cjennings.net 2025-10-27T01:48:20+00:00 urn:sha1:1066d0410660d1820064c757abe7b5aad6e6070f Refactor 4 whitespace manipulation functions (remove-leading-trailing, collapse-whitespace, delete-blank-lines, hyphenate-whitespace) to use interactive/non-interactive pattern for testability. Add 73 tests across 4 test files covering normal, boundary, and error cases. Fix linter warnings and add proper input validation.