Blank lines between includes in index.adoc

content/index.adoc

@@ -26,24 +26,34 @@ ifndef::use-antora-rules[]
 
 [preface]
 include::./general_docs/foreword.adoc[leveloffset=+1]
+
 [preface]
 include::./general_docs/introduction.adoc[leveloffset=+1]
 
 :sectnums:
 include::./general_docs/scope.adoc[leveloffset=+1]
-include::./general_docs/normative_references.adoc[leveloffset=+2]
-include::./general_docs/abbreviations.adoc[leveloffset=+3]
-include::./general_docs/backward_compatibility.adoc[leveloffset=+4]
-include::./terms_and_definitions/terms_and_definitions.adoc[leveloffset=+5]
+
+include::./general_docs/normative_references.adoc[leveloffset=+1]
+
+include::./general_docs/abbreviations.adoc[leveloffset=+1]
+
+include::./general_docs/backward_compatibility.adoc[leveloffset=+1]
+
+include::./terms_and_definitions/terms_and_definitions.adoc[leveloffset=+1]
+
 include::./use_cases/use_cases.adoc[leveloffset=+1]
+
 == Geometry
+
 //include::geometry/geometry-index.adoc[leveloffset=+1]
 //include::./geometry/Introduction.adoc[leveloffset=+2]
 //include::./geometry/General.adoc[leveloffset=+2]
 //include::./geometry/object-classes.adoc[leveloffset=+2]
 //include::./geometry/File_format_support.adoc[leveloffset=+2]
 //include::./geometry/Performance.adoc[leveloffset=+2]
+
 == Material
+
 //include::material/general-structure-index.adoc[leveloffset=+1]
 //include::./material/Introduction.adoc[leveloffset=+2]
 //include::./material/Fileformat.adoc[leveloffset=+2]