Make shescape escape all arguments and not just the first one

This makes the %shescape macro work use all arguments like we
already do in the %quote macro.

I.e.:
    %{shescpae:hello world} -> 'hello world'
    %{shescpae hello world} -> 'hello' 'world'

rpmio/macro.c

@@ -1164,15 +1164,20 @@ static void doVerbose(rpmMacroBuf mb, rpmMacroEntry me, ARGV_t argv, size_t *par
 
 static void doShescape(rpmMacroBuf mb, rpmMacroEntry me, ARGV_t argv, size_t *parsed)
 {
-    rpmMacroBufAppend(mb, '\'');
-    for (const char *s = argv[1]; *s != '\0'; s++) {
-	if (*s == '\'') {
-	    rpmMacroBufAppendStr(mb, "'\\''");
-	} else {
-	    rpmMacroBufAppend(mb, *s);
+    int i;
+    for (i = 1 ; argv[i]; i++) {
+	if (i != 1)
+	    rpmMacroBufAppend(mb, ' ');
+	rpmMacroBufAppend(mb, '\'');
+	for (const char *s = argv[i]; *s != '\0'; s++) {
+	    if (*s == '\'') {
+		rpmMacroBufAppendStr(mb, "'\\''");
+	    } else {
+		rpmMacroBufAppend(mb, *s);
+	    }
 	}
+	rpmMacroBufAppend(mb, '\'');
     }
-    rpmMacroBufAppend(mb, '\'');
 }
 
 static uint64_t getmem_total(void)

tests/rpmmacro.at

@@ -1101,6 +1101,18 @@ runroot rpm \
 [])
 RPMTEST_CLEANUP
 
+AT_SETUP([%shescape macro with multiple arguments])
+AT_KEYWORDS([macros])
+RPMTEST_CHECK([
+runroot rpm \
+	--eval "%{shescape foo bar's}"
+],
+[0],
+['foo' 'bar'\''s'
+],
+[])
+
+RPMTEST_CLEANUP
 AT_SETUP([macro with a line starting by "{"])
 AT_KEYWORDS([macros])
 RPMTEST_CHECK([