dev: Make schema zsh compatible

ChangeLog: None

plugins/Makefile

@@ -220,7 +220,7 @@ SQL_LISTRPCS_SCHEMAS := $(foreach l,$(SQL_LISTRPCS),doc/schemas/$l.schema.json)
 # make invalid JSON. Grr!
 # But these simple removals drop us from 100k to 29k.
 plugins/sql-schema_gen.h: plugins/Makefile $(SQL_LISTRPCS_SCHEMAS)
-	@$(call VERBOSE,GEN $@, (SEP=""; echo -n '"{'; for f in $(SQL_LISTRPCS); do echo -n "$$SEP\\\"$$f\\\":"; sed -e s/\"description\":\ *\".\*\"/\"\":\"\"/ -e s/\".*\":\ *{}/\"\":{}/ -e s/\"/\\\\\"/g < doc/schemas/$$f.schema.json | tr -d ' \n'; SEP=","; done; echo '}"') > $@)
+	@$(call VERBOSE,GEN $@, (SEP=""; printf '%s' '"{'; for f in $(SQL_LISTRPCS); do printf '%s' "$$SEP\\\"$$f\\\":"; sed -e s/\"description\":\ *\".\*\"/\"\":\"\"/ -e s/\".*\":\ *{}/\"\":{}/ -e s/\"/\\\\\"/g < doc/schemas/$$f.schema.json | tr -d ' \n'; SEP=","; done; echo '}"') > $@)
 
 plugins/sql.o: plugins/sql-schema_gen.h
 plugins/sql: $(PLUGIN_SQL_OBJS) $(PLUGIN_LIB_OBJS) $(PLUGIN_COMMON_OBJS) $(JSMN_OBJS) common/gossip_store.o gossipd/gossip_store_wiregen.o