Avoid using multi-line values for style items

src/libexec/saturnin-dmenu

@@ -23,11 +23,11 @@ while true; do case $1 in
     *)              break             ;;
 esac done
 
-nb="$(inigrep -p style.color.nbg)"
-nf="$(inigrep -p style.color.nfg)"
-sb="$(inigrep -p style.color.sbg)"
-sf="$(inigrep -p style.color.sfg)"
-fn="$(inigrep -p style.font)"
+nb="$(inigrep -1 -p style.color.nbg)"
+nf="$(inigrep -1 -p style.color.nfg)"
+sb="$(inigrep -1 -p style.color.sbg)"
+sf="$(inigrep -1 -p style.color.sfg)"
+fn="$(inigrep -1 -p style.font)"
 fn=${fn:--*-terminus-medium-r-*-*-16-*-*-*-*-*-*-*}
 
 debug -v nb nf sb sf fn lines maybe_split delim