gendoc infra: cosmetic fixes

- wrap lines to 80 characters
- fix space/tab mixup

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Acked-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
[yann.morin.1998@free.fr: tested all but PDF]
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

docs/manual/manual.mk

@@ -70,8 +70,8 @@ $$(O)/docs/$(1)/$(1).$(4): docs/$(1)/$(1).txt \
 	$$(Q)mkdir -p $$(@D)/.build
 	$$(Q)rsync -au docs/$(1)/*.txt $$(@D)/.build
 	$$(Q)a2x $(6) -f $(2) -d book -L -r $$(TOPDIR)/docs/images \
-	        -D $$(@D) $$(@D)/.build/$(1).txt \
-	        --asciidoc-opts="$$(MANUAL_$(2)_ASCIIDOC_OPTS)"
+		--asciidoc-opts="$$(MANUAL_$(2)_ASCIIDOC_OPTS)" \
+		-D $$(@D) $$(@D)/.build/$(1).txt
 	-$$(Q)rm -rf $$(@D)/.build
 endef
 
@@ -84,9 +84,12 @@ endef
 # The variable <DOCUMENT_NAME>_SOURCES defines the dependencies.
 ################################################################################
 define GENDOC
-$(call GENDOC_INNER,$(pkgname),xhtml,html,html,HTML,--xsltproc-opts "--stringparam toc.section.depth 1")
-$(call GENDOC_INNER,$(pkgname),chunked,split-html,chunked,split HTML,--xsltproc-opts "--stringparam toc.section.depth 1")
-$(call GENDOC_INNER,$(pkgname),pdf,pdf,pdf,PDF,--dblatex-opts "-P latex.output.revhistory=0")
+$(call GENDOC_INNER,$(pkgname),xhtml,html,html,HTML,\
+	--xsltproc-opts "--stringparam toc.section.depth 1")
+$(call GENDOC_INNER,$(pkgname),chunked,split-html,chunked,split HTML,\
+	--xsltproc-opts "--stringparam toc.section.depth 1")
+$(call GENDOC_INNER,$(pkgname),pdf,pdf,pdf,PDF,\
+	--dblatex-opts "-P latex.output.revhistory=0")
 $(call GENDOC_INNER,$(pkgname),text,text,text,text)
 $(call GENDOC_INNER,$(pkgname),epub,epub,epub,ePUB)
 clean: $(pkgname)-clean