+# INSTALL file with old ASCII quotation marks (looks ugly on modern machines).
+INSTALL: install.texi
+ $(MAKEINFO) --plaintext --no-validate $< > $@
+
+# INSTALL file with ISO 646 or ISO 8859 quotation marks.
+INSTALL.ISO: install.texi
+ $(MAKEINFO) --plaintext --no-validate $< | sed -e "s/\`\([^']*\)'/'\1'/g" > $@
+
+# INSTALL file wit ISO 10646 (Unicode) quotation marks.
+INSTALL.UTF-8: install.texi
+ $(MAKEINFO) --plaintext --no-validate $< | sed -e "s/\`\([^']*\)'/‘\1’/g" > $@
+