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 The `%c` specifier converts a single character to a decimal string.
 
-ASCII's integer values 0-31 are control characters, 32-127 are for US layout keyboards, and 128-255
-are "extended" ASCII.
+ASCII's integer values 0-31 and 128 are control characters, 32-126 are for US layout keyboard printable
+characters, and 128-255 are "extended" ASCII.
 
 Strings are finite sequences of characters. Other natural languages include RTL character sets and
 Asian fonts (CJK). Julia makes dealing with ASCII text simple and efficient, and handling Unicode is