Docs: Replace tabindex example in submit button functions documentation.

Most of the `tabindex` attributes across the admin were removed in [21311].

This commit updates the example for the `$other_attributes` parameter to use the `id` attribute instead.

Includes synchronizing documentation between `submit_button()` and `get_submit_button()`.

Follow-up to [15810], [16061], [21311], [27136], [31599].

Props benjaminknox, sabernhardt, fushar, SergeyBiryukov.
Fixes #59768.

git-svn-id: https://develop.svn.wordpress.org/trunk@57114 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-admin/includes/template.php

@@ -2540,20 +2540,20 @@ function compression_test() {
  *
  * @see get_submit_button()
  *
- * @param string       $text             The text of the button (defaults to 'Save Changes')
+ * @param string       $text             Optional. The text of the button. Defaults to 'Save Changes'.
  * @param string       $type             Optional. The type and CSS class(es) of the button. Core values
  *                                       include 'primary', 'small', and 'large'. Default 'primary'.
- * @param string       $name             The HTML name of the submit button. Defaults to "submit". If no
- *                                       id attribute is given in $other_attributes below, $name will be
- *                                       used as the button's id.
- * @param bool         $wrap             True if the output button should be wrapped in a paragraph tag,
- *                                       false otherwise. Defaults to true.
- * @param array|string $other_attributes Other attributes that should be output with the button, mapping
- *                                       attributes to their values, such as setting tabindex to 1, etc.
- *                                       These key/value attribute pairs will be output as attribute="value",
- *                                       where attribute is the key. Other attributes can also be provided
- *                                       as a string such as 'tabindex="1"', though the array format is
- *                                       preferred. Default null.
+ * @param string       $name             Optional. The HTML name of the submit button. If no `id` attribute
+ *                                       is given in the `$other_attributes` parameter, `$name` will be used
+ *                                       as the button's `id`. Default 'submit'.
+ * @param bool         $wrap             Optional. True if the output button should be wrapped in a paragraph tag,
+ *                                       false otherwise. Default true.
+ * @param array|string $other_attributes Optional. Other attributes that should be output with the button,
+ *                                       mapping attributes to their values, e.g. `array( 'id' => 'search-submit' )`.
+ *                                       These key/value attribute pairs will be output as `attribute="value"`,
+ *                                       where attribute is the key. Attributes can also be provided as a string,
+ *                                       e.g. `id="search-submit"`, though the array format is generally preferred.
+ *                                       Default null.
  */
 function submit_button( $text = null, $type = 'primary', $name = 'submit', $wrap = true, $other_attributes = null ) {
 	echo get_submit_button( $text, $type, $name, $wrap, $other_attributes );
@@ -2564,20 +2564,20 @@ function submit_button( $text = null, $type = 'primary', $name = 'submit', $wrap
  *
  * @since 3.1.0
  *
- * @param string       $text             Optional. The text of the button. Default 'Save Changes'.
+ * @param string       $text             Optional. The text of the button. Defaults to 'Save Changes'.
  * @param string       $type             Optional. The type and CSS class(es) of the button. Core values
  *                                       include 'primary', 'small', and 'large'. Default 'primary large'.
- * @param string       $name             Optional. The HTML name of the submit button. Defaults to "submit".
- *                                       If no id attribute is given in $other_attributes below, `$name` will
- *                                       be used as the button's id. Default 'submit'.
- * @param bool         $wrap             Optional. True if the output button should be wrapped in a paragraph
- *                                       tag, false otherwise. Default true.
+ * @param string       $name             Optional. The HTML name of the submit button. If no `id` attribute
+ *                                       is given in the `$other_attributes` parameter, `$name` will be used
+ *                                       as the button's `id`. Default 'submit'.
+ * @param bool         $wrap             Optional. True if the output button should be wrapped in a paragraph tag,
+ *                                       false otherwise. Default true.
  * @param array|string $other_attributes Optional. Other attributes that should be output with the button,
- *                                       mapping attributes to their values, such as `array( 'tabindex' => '1' )`.
- *                                       These attributes will be output as `attribute="value"`, such as
- *                                       `tabindex="1"`. Other attributes can also be provided as a string such
- *                                       as `tabindex="1"`, though the array format is typically cleaner.
- *                                       Default empty.
+ *                                       mapping attributes to their values, e.g. `array( 'id' => 'search-submit' )`.
+ *                                       These key/value attribute pairs will be output as `attribute="value"`,
+ *                                       where attribute is the key. Attributes can also be provided as a string,
+ *                                       e.g. `id="search-submit"`, though the array format is generally preferred.
+ *                                       Default empty string.
  * @return string Submit button HTML.
  */
 function get_submit_button( $text = '', $type = 'primary large', $name = 'submit', $wrap = true, $other_attributes = '' ) {