DOC-2354: Add TINY-10766 release note entry (#3199)

* DOC-2354: Add TINY-10766 release note entry

* improve paragraphs and add reference back to known issue in 7.0 release notes

* improvement to entry

* add reference back to fix from original 7.0 known issue entry

modules/ROOT/pages/7.0-release-notes.adoc

@@ -851,6 +851,8 @@ Currently, Non-breaking spaces `+ +` may be inadvertently inserted around c
 <p>&nbsp;</p> // unexpected
 ----
 
+NOTE: This issue xref:7.0.1-release-notes.adoc#pasting-markdown-into-some-situations-would-cause-the-pasted-data-to-be-placed-in-unexpected-places[is addressed] in {productname} 7.0.1.
+
 === Tab navigation inside the Enhanced Code Editor function as expected when the host browser is Safari.
 // #TINY-10596
 

modules/ROOT/pages/7.0.1-release-notes.adoc

@@ -82,6 +82,23 @@ In {productname} {release-version}, this issue has been fixed. Now, the autocomp
 
 For information on the **Mentions** plugin, see: xref:mentions.adoc[Mentions].
 
+=== Markdown
+
+The {productname} {release-version} release includes an accompanying release of the **Markdown** premium plugin.
+
+This **Markdown** release includes the following fixes and improvements.
+
+==== Pasting markdown into some situations would cause the pasted data to be placed in unexpected places.
+// #TINY-10766 / TINY-10788 / #TINY-10749
+
+Previously in the **Markdown** plugin, the "markdown-on-paste" feature used the `editor.selection.setContent` function to insert content into the {productname} editor. This approach resulted in some unnecessary `+ +` characters being appended before and after the pasted text. As a result, the editor experienced some unexpected content placement behavior and possible duplicated content.
+
+{productname} {release-version} addresses this issue by changing the paste feature to use the `editor.insertContent` function instead. As a result, pasting markdown no longer adds unnecessary `+ +` and the pasted content is placed correctly and does not duplicate.
+
+NOTE: This fix addresses xref:7.0-release-notes.adoc#non-breaking-spaces-nbsp-may-be-inadvertently-inserted-around-content-during-markdown-conversion[a known issue] in the xref:markdown.adoc[Markdown premium plugin].
+
+For information on the **Markdown** plugin, see: xref:markdown.adoc[Markdown].
+
 === <Premium plugin name 1> <Premium plugin name 1 version>
 
 The {productname} {release-version} release includes an accompanying release of the **<Premium plugin name 1>** premium plugin.