Custom XSL for SharePoint List View Web Part

How to safely override Out-Of-The-Box (OOTB) XSLT List View with three column of Multiple lines of text - Rich Text - Append Changes to Existing Text:

Before:

Applying custom XSL:

 After:

Custom XSL:

<xsl:stylesheet xmlns:x="http://www.w3.org/2001/XMLSchema" xmlns:d="http://schemas.microsoft.com/sharepoint/dsp" version="1.0" exclude-result-prefixes="xsl msxsl ddwrt" xmlns:ddwrt="http://schemas.microsoft.com/WebParts/v2/DataView/runtime" xmlns:asp="http://schemas.microsoft.com/ASPNET/20" xmlns:__designer="http://schemas.microsoft.com/WebParts/v2/DataView/designer" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:SharePoint="Microsoft.SharePoint.WebControls" xmlns:ddwrt2="urn:frontpage:internal" xmlns:o="urn:schemas-microsoft-com:office:office"> <xsl:include href="/_layouts/xsl/main.xsl"/> <xsl:include href="/_layouts/xsl/internal.xsl"/> <xsl:template name="FieldRef_Note_body.Comment" match="FieldRef[@Name='Comment']" mode="Note_body"> <xsl:param name="thisNode" select="."/> <div class="trim-append-only-history"> <SharePoint:AppendOnlyHistory FieldName="Comment" runat="server" ControlMode="Display" itemid="{$thisNode/@ID}" /> </div> </xsl:template> <xsl:template name="FieldRef_Note_body.V3Comments" match="FieldRef[@Name='V3Comments']" mode="Note_body"> <xsl:param name="thisNode" select="."/> <div class="trim-append-only-history"> <SharePoint:AppendOnlyHistory FieldName="V3Comments" runat="server" ControlMode="Display" itemid="{$thisNode/@ID}" /> </div> </xsl:template> <xsl:template name="FieldRef_Note_body.Issues_x0020_and_x0020_decisions" match="FieldRef[@Name='Issues_x0020_and_x0020_decisions']" mode="Note_body"> <xsl:param name="thisNode" select="."/> <div class="trim-append-only-history-to-first-div"> <SharePoint:AppendOnlyHistory FieldName="Issues_x0020_and_x0020_decisions" runat="server" ControlMode="Display" itemid="{$thisNode/@ID}" /> </div> </xsl:template> </xsl:stylesheet>