Make member functions constant. #32881

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/branches/refactor_opt@1698 1136aad2-a195-0410-b898-f5ea1d11b9d8
Fix inconsistency in GEDIIS. #32881

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/branches/refactor_opt@1699 1136aad2-a195-0410-b898-f5ea1d11b9d8