else
# In the 5.x version they added `--split=chapters|sections` in
# addition to `--split=nodes`.
-AM_MAKEINFOHTMLFLAGS = --split=sections --css-ref=style.css --css-ref=manual.css
+AM_MAKEINFOHTMLFLAGS = --split=sections --css-ref="style.css" --css-ref="manual.css"
endif
dist_infoimage_DATA = \
else
# In the 5.x version they added `--split=chapters|sections` in
# addition to `--split=nodes`.
-AM_MAKEINFOHTMLFLAGS = --split=sections --css-ref=style.css --css-ref=manual.css
+AM_MAKEINFOHTMLFLAGS = --split=sections --css-ref="style.css" --css-ref="manual.css"
endif
#DOT_OPTIONS = \