doc: Fix formatting in syntax reference

doc/syntax-reference.md

@@ -42,11 +42,11 @@ Matches exactly the characters contained inside the quotation marks.
 
 #### Special characters
 
-Special characters (`"`, `\`, and `'`) can be escaped with a backslash -- e.g., `"\""` will match a literal quote character in the input stream. Other valid escape sequences include: `\b` (backspace), `\f` (form feed), `\n` (line feed), `\r` (carriage return), and `\t` (tab), as well as `\x` followed by 2 hex digits and `\u` followed by 4 hex digits, for matching characters by code point.
+Special characters (`"`, `\`, and `'`) can be escaped with a backslash — e.g., `"\""` will match a literal quote character in the input stream. Other valid escape sequences include: `\b` (backspace), `\f` (form feed), `\n` (line feed), `\r` (carriage return), and `\t` (tab), as well as `\x` followed by 2 hex digits and `\u` followed by 4 hex digits, for matching characters by code point.
 
-The <code>\u{<i>hexDigits<i>}</code> escape sequence can be used to represent _any_ Unicode code point, including code points above `0xFFFF`. E.g., `"\u{1F639}"` will match `'😹'`. (_New in Ohm v16.3.0._)
+The <code>\u{<i>hexDigits</i>}</code> escape sequence can be used to represent _any_ Unicode code point, including code points above `0xFFFF`. E.g., `"\u{1F639}"` will match `'😹'`. (_New in Ohm v16.3.0._)
 
-**NOTE:** For grammars defined in a JavaScript string literal (i.e., not in a separate .ohm file), it's recommended to use a [template literal with the String.raw tag](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/raw). Without `String.raw`, you'll need to use double-escaping -- e.g., `\\n` rather than `\n`.
+**NOTE:** For grammars defined in a JavaScript string literal (i.e., not in a separate .ohm file), it's recommended to use a [template literal with the String.raw tag](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/raw). Without `String.raw`, you'll need to use double-escaping — e.g., `\\n` rather than `\n`.
 
 ### Terminal Range