Adds documentation for cmd-e shortcut (github#19889)

Author: emmaviolet

content/github/getting-started-with-github/using-github/keyboard-shortcuts.md

@@ -76,7 +76,8 @@ For more keyboard shortcuts, see the [CodeMirror documentation](https://codemirr
 | Keyboard shortcut | Description
 |-----------|------------
 | <kbd>control b</kbd> or <kbd>command b</kbd> | Inserts Markdown formatting for bolding text
-| <kbd>control i</kbd> or <kbd>command i</kbd> | Inserts Markdown formatting for italicizing text
+| <kbd>control i</kbd> or <kbd>command i</kbd> | Inserts Markdown formatting for italicizing text{% if currentVersion == "free-pro-team@latest" or currentVersion == "github-ae@next" or currentVersion ver_gt "[email protected]" %}
+| <kbd>control e</kbd> or <kbd>command e</kbd> | Inserts Markdown formatting for code or a command within a line{% endif %}
 | <kbd>control k</kbd> or <kbd>command k</kbd> | Inserts Markdown formatting for creating a link
 | <kbd>control shift p</kbd> or <kbd>command shift p</kbd>| Toggles between the **Write** and **Preview** comment tabs
 | <kbd>control enter</kbd> | Submits a comment

content/github/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax.md

@@ -53,7 +53,7 @@ In the words of Abraham Lincoln:
 
 ## Quoting code
 
-You can call out code or a command within a sentence with single backticks. The text within the backticks will not be formatted.
+You can call out code or a command within a sentence with single backticks. The text within the backticks will not be formatted.{% if currentVersion == "free-pro-team@latest" or currentVersion == "github-ae@next" or currentVersion ver_gt "[email protected]" %} You can also press the `command` or `Ctrl` + `e` keyboard shortcut to insert the backticks for a code block within a line of Markdown.{% endif %}
 
 ```markdown
 Use `git status` to list all new or modified files that haven't yet been committed.
@@ -78,7 +78,7 @@ For more information, see "[Creating and highlighting code blocks](/articles/cre
 
 ## Links
 
-You can create an inline link by wrapping link text in brackets `[ ]`, and then wrapping the URL in parentheses `( )`. You can also use the keyboard shortcut `command + k` to create a link.
+You can create an inline link by wrapping link text in brackets `[ ]`, and then wrapping the URL in parentheses `( )`. {% if currentVersion == "free-pro-team@latest" or if currentVersion == "github-ae@next" or if currentVersion ver_gt "[email protected]" %}You can also use the keyboard shortcut `command + k` to create a link.{% endif %}
 
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