The atomcontainer manipulator which has a method named getTotalHydrogenCount which actually returns the number of implicit hydrogens only.
- Changed method to reflect it's name and actually get the total hydrogen count (+ modified unit test result)
- Added new method just for implicit hydrogens (+ unit tests)
- Checked usages of getTotalHydrogenCount and the only usages are in AtomContainer/Molecule-SetManipulator and have check the tests still pass for these also.
- Increased documentation
Could be applied to 1.4.x or master - as it's an change in functionality (to match method name) I would vote for master.