parse.y: relax spaces

* parse.y (parser_tokadd_utf8): relax restriction spaces inside
  "\u{...}".

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56963 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

parse.y

@@ -5800,6 +5800,8 @@ parser_tokadd_utf8(struct parser_params *parser, rb_encoding **encp,
 
     if (peek(open_brace)) {  /* handle \u{...} form */
 	int c, last = nextc();
+	do c = nextc(); while (ISSPACE(c));
+	pushback(c);
 	do {
 	    if (regexp_literal) tokadd(last);
 	    codepoint = scan_hex(lex_p, 6, &numlen);
@@ -5816,7 +5818,8 @@ parser_tokadd_utf8(struct parser_params *parser, rb_encoding **encp,
 					 codepoint, (int)numlen)) {
 		return 0;
 	    }
-	    if (ISSPACE(c = nextc())) last = c;
+	    while (ISSPACE(c = nextc())) last = c;
+	    pushback(c);
 	} while (string_literal && c != close_brace);
 
 	if (c != close_brace) {
@@ -5825,6 +5828,7 @@ parser_tokadd_utf8(struct parser_params *parser, rb_encoding **encp,
 	}
 
 	if (regexp_literal) tokadd(close_brace);
+	nextc();
     }
     else {			/* handle \uxxxx form */
 	codepoint = scan_hex(lex_p, 4, &numlen);

test/ruby/test_unicode_escape.rb

@@ -260,9 +260,9 @@ EOS
        eval %q("\u{123.}")  # bad char
      }
 
-     assert_raise(SyntaxError) { eval %q("\u{123 456 }")}  # extra space
-     assert_raise(SyntaxError) { eval %q("\u{ 123 456}")}  # extra space
-     assert_raise(SyntaxError) { eval %q("\u{123  456}")}  # extra space
+     # assert_raise(SyntaxError) { eval %q("\u{123 456 }")}  # extra space
+     # assert_raise(SyntaxError) { eval %q("\u{ 123 456}")}  # extra space
+     # assert_raise(SyntaxError) { eval %q("\u{123  456}")}  # extra space
 
      assert_raise(SyntaxError) { eval %q("\uD800") }       # surrogate block
      assert_raise(SyntaxError) { eval %q("\uDCBA") }       # surrogate block