Shrink table in the reference

Fixes #20051

Author: steveklabnik

src/doc/reference.md

@@ -229,14 +229,14 @@ cases mentioned in [Number literals](#number-literals) below.
 
 ##### Characters and strings
 
-|   | Example | Number of `#` pairs allowed | Available characters | Escapes | Equivalent to |
-|---|---------|-----------------------------|----------------------|---------|---------------|
-| [Character](#character-literals) | `'H'` | `N/A` | All unicode | `\'` & [Byte escapes](#byte-escapes) & [Unicode escapes](#unicode-escapes) | `N/A` |
-| [String](#string-literals) | `"hello"` | `N/A` | All unicode | `\"` & [Byte escapes](#byte-escapes) & [Unicode escapes](#unicode-escapes) | `N/A` |
-| [Raw](#raw-string-literals) | `r##"hello"##`  | `0...` | All unicode | `N/A` | `N/A` |
-| [Byte](#byte-literals) | `b'H'` | `N/A` | All ASCII | `\'` & [Byte escapes](#byte-escapes) | `u8` |
-| [Byte string](#byte-string-literals) | `b"hello"` | `N/A`  | All ASCII | `\"` & [Byte escapes](#byte-escapes) | `&'static [u8]` |
-| [Raw byte string](#raw-byte-string-literals) | `br##"hello"##` | `0...` | All ASCII | `N/A` | `&'static [u8]` (unsure...not stated) |
+|                                              | Example       | # sets | Characters  | Escapes             |
+|----------------------------------------------|---------------|--------|-------------|---------------------|
+| [Character](#character-literals)             | 'H'           | N/A    | All Unicode | \' & [Byte](#byte-escapes) & [Unicode](#unicode-escapes) |
+| [String](#string-literals)                   | "hello"       | N/A    | All Unicode | \" & [Byte](#byte-escapes) & [Unicode](#unicode-escapes) |
+| [Raw](#raw-string-literals)                  | r#"hello"#    | 0...   | All Unicode | N/A                                                      |
+| [Byte](#byte-literals)                       | b'H'          | N/A    | All ASCII   | \' & [Byte](#byte-escapes)                               |
+| [Byte string](#byte-string-literals)         | b"hello"      | N/A    | All ASCII   | \" & [Byte](#byte-escapes)                               |
+| [Raw byte string](#raw-byte-string-literals) | br#"hello"#   | 0...   | All ASCII   | N/A                                                      |
 
 ##### Byte escapes