diff --git a/src/BuildDoc.cmake b/src/BuildDoc.cmake
index bb149b1fab3eb9a1c768277813039407fb754f7c..d51fba1aa99d02b9127d2a0fe797fc5433448155 100644
--- a/src/BuildDoc.cmake
+++ b/src/BuildDoc.cmake
@@ -6,15 +6,31 @@ find_package (
 	OPTIONAL_COMPONENTS mscgen dia
 )
 
-set(DOXYGEN_FOUND ${DOXYGEN_FOUND} PARENT_SCOPE)
+set (
+	DOXYGEN_FOUND
+	${DOXYGEN_FOUND}
+	PARENT_SCOPE
+)
 
-set(IHTA_CMAKE_COMMON_DOCSTYLE_LANDED ${CMAKE_CURRENT_LIST_DIR}/resources/landed.css)
-set(IHTA_CMAKE_COMMON_DOCSTYLE_RWTH ${CMAKE_CURRENT_LIST_DIR}/resources/rwth.css)
-set(IHTA_CMAKE_COMMON_DOC_LOGO ${CMAKE_CURRENT_LIST_DIR}/resources/ihta.svg)
+set (IHTA_CMAKE_COMMON_DOCSTYLE_LANDED ${CMAKE_CURRENT_LIST_DIR}/resources/landed.css)
+set (IHTA_CMAKE_COMMON_DOCSTYLE_RWTH ${CMAKE_CURRENT_LIST_DIR}/resources/rwth.css)
+set (IHTA_CMAKE_COMMON_DOC_LOGO ${CMAKE_CURRENT_LIST_DIR}/resources/ihta.svg)
 
-set(IHTA_CMAKE_COMMON_DOCSTYLE_LANDED ${IHTA_CMAKE_COMMON_DOCSTYLE_LANDED} PARENT_SCOPE)
-set(IHTA_CMAKE_COMMON_DOCSTYLE_RWTH ${IHTA_CMAKE_COMMON_DOCSTYLE_RWTH} PARENT_SCOPE)
-set(IHTA_CMAKE_COMMON_DOC_LOGO ${IHTA_CMAKE_COMMON_DOC_LOGO} PARENT_SCOPE)
+set (
+	IHTA_CMAKE_COMMON_DOCSTYLE_LANDED
+	${IHTA_CMAKE_COMMON_DOCSTYLE_LANDED}
+	PARENT_SCOPE
+)
+set (
+	IHTA_CMAKE_COMMON_DOCSTYLE_RWTH
+	${IHTA_CMAKE_COMMON_DOCSTYLE_RWTH}
+	PARENT_SCOPE
+)
+set (
+	IHTA_CMAKE_COMMON_DOC_LOGO
+	${IHTA_CMAKE_COMMON_DOC_LOGO}
+	PARENT_SCOPE
+)
 
 #[=======================================================================[.rst:
 ..command:: build_doc