try to fix one line

Author: tbrowder

doc/Language/opener-chars.pod6

@@ -10,11 +10,11 @@ brackets in such constructs as I<Pod6 declarator blocks>.
 The source for the table is the C<token opener> defined in the C<role STD>
 in the C<Rakudo grammar>.
 
-=begin table :caption<Opener Graphenes>
+=begin table :caption<Opener Graphemes>
 Char | Hex | Char | Hex | Char | Hex | Char | Hex
 =====+=====+======+=====+======+=====+======+====
 
-\x[0x0028] | 0x0028 | \x[0x003C] | 0x003C | \x[0x005B] | 0x005B | \x[0x007B] | 0x007B
+\\x[0x0028] | 0x0028 | \\x[0x003C] | 0x003C | \\x[0x005B] | 0x005B | \\x[0x007B] | 0x007B
 --------+---------+---------+---------+---------+---------+---------+--------
 \x[0x00AB] | 0x00AB | \x[0x0F3A] | 0x0F3A | \x[0x0F3C] | 0x0F3C | \x[0x169B] | 0x169B
 --------+---------+---------+---------+---------+---------+---------+--------