White space formatting fixes

Closes: <https://github.com/nginx/unit/pull/1062>

pkg/rpm/Makefile

@@ -254,7 +254,7 @@ rpmbuild/SPECS/unit-%.spec: unit.module.spec.in ../../docs/changes.xml | rpmbuil
 	cat ../../build/unit-$(MODULE_SUFFIX_$*).rpm-changelog | sed -e \
 		"s/> - $(DEFAULT_VERSION)-$(DEFAULT_RELEASE)/> - $(MODULE_VERSION_$*)-$(MODULE_RELEASE_$*)/" \
 		>> $@.tmp
-	mv $@.tmp $@ 
+	mv $@.tmp $@
 
 unit-%: check-build-depends-% rpmbuild/SPECS/unit-%.spec rpmbuild/SOURCES/unit-$(VERSION).tar.gz
 	@echo "===> Building $(subst _,-,$@) package" ; \