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Corrected the inline and block elements explanations. Do not mix up CSS display model with HTML 4 content model.
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This reverts commit e610491ac4f7156d7ed10aeca30c1241b9488859.
Merge branch 'master' into html-extended
Changed directory name, see 906ec111bb
Restored more stuff, which were removed in 00bf811, see a83c6f2, cb09794, #49