Add std17::basic_string_view types to table [ci skip]

Author: martinmoene

README.md

@@ -100,11 +100,16 @@ The following table presents types, values and simplified, short prototypes of t
 
 | Kind              | Type or function                                                                                      | Notes                                                                                                                 |
 | ----------------- | ----------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
-| **Type**          | None                                                                                                  |                                                                             |
+| **Type**          | [string::]std17::basic_string_view                                                                    | std::basic_string_view for C++17 and later, polyfill otherwise                                                        |
+|              | [string::]std17::string_view                                                                          | character variations as requested, see section Configuration                                                          |
+|              | [string::]std17::wstring_view;                                                                        |                                                                                                                  |
+|              | [string::]std17::u8string_view;                                                                       |                                                                                                                  |
+|              | [string::]std17::u16string_view;                                                                      |                                                                                                                  |
+|              | [string::]std17::u32string_view;                                                                      |                                                                                                                  |
 |              |                                                                                                  |                                                                                                                  |
 | **Value**         | size_t **string::npos**                                                                               | not-found position value, in nonstd::string namespace                                                                 |
 |              |                                                                                                  |                                                                                                                  |
-| **Utilities**     | string **to_string**(string_view sv)                                                                  | string from local or C++17 std string_view                                                                            |
+| **Utility**       | string **to_string**(string_view sv)                                                                  | string from local or C++17 std string_view                                                                            |
 |              |                                                                                                  |                                                                                                                  |
 | **Comparison**    | int **compare**(string_view lhs, string_view rhs)                                                     | negative, zero or positive for lsh is less than, equal to or greater than rhs                                         |
 |              | bool **operator==**(string_view lhs, string_view rhs)                                                 | true if lhs string is equal to rhs string                                                                             |
@@ -114,7 +119,7 @@ The following table presents types, values and simplified, short prototypes of t
 |              | bool **operator>=**(string_view lhs, string_view rhs)                                                 | true if lhs string is greater than or equal to rhs string                                                             |
 |              | bool **operator>**(string_view lhs, string_view rhs)                                                  | true if lhs string is greater than or equal to rhs string                                                             |
 |              |                                                                                                  |                                                                                                                  |
-| **Observers**     | size_t **length**(string_view sv)                                                                     | length of string                                                                                                      |
+| **Observer**      | size_t **length**(string_view sv)                                                                     | length of string                                                                                                      |
 |              | size_t **size**(string_view sv)                                                                       | length of string                                                                                                      |
 |              | bool **is_empty**(string_view sv)                                                                     | true if string is empty                                                                                               |
 |              |                                                                                                  |                                                                                                                  |
@@ -141,7 +146,7 @@ The following table presents types, values and simplified, short prototypes of t
 |              | size_t **find_last_of**(string_view sv, string_view set)                                              | position of last occurrence of character in set, or npos                                                              |
 |              | size_t **find_last_not_of**(string_view sv, string_view set)                                          | position of last occurrence of character not in set, or npos                                                          |
 |              |                                                                                                  |                                                                                                                  |
-| **Modifiers**     | char_t **to_lowercase**(char_t chr)                                                                   | character transformed to lowercase                                                                                    |
+| **Modifier**      | char_t **to_lowercase**(char_t chr)                                                                   | character transformed to lowercase                                                                                    |
 |              | char_t **to_uppercase**(char_t chr)                                                                   | character transformed to uppercase                                                                                    |
 |              | string **to_lowercase**(string_view sv)                                                               | string transformed to lowercase                                                                                       |
 |              | string **to_uppercase**(string_view sv)                                                               | string transformed to uppercase                                                                                       |