- removed a declaration of nonexistent function


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code@16802 25697fe4-d644-49b8-9d30-be5465f2adf3
- corrected confused = and += between addition and assignment to Hessian
  diagonal and
- use fabs() when testing whether parameter changes are larger than ε


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code@16803 25697fe4-d644-49b8-9d30-be5465f2adf3
- removed some dead debugging code


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code@16804 25697fe4-d644-49b8-9d30-be5465f2adf3
- added a missing return value documentation


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code@16805 25697fe4-d644-49b8-9d30-be5465f2adf3
- generate fitting data noise as additive for tests
- this makes the assumed noise properties to match the actual noise properties
  and fixes error estimates; we can essentially assert estimated ≲ true error
  now
- some verbose mode improvements


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code@16806 25697fe4-d644-49b8-9d30-be5465f2adf3
- fixed or wrote some missing documentation


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code@16807 25697fe4-d644-49b8-9d30-be5465f2adf3