Github #2823 - Truncate output to 32K when @OutputXMLasNVARCHAR = 1 is used so it parses nicely into Excel.

Author: Ties Voskamp

sp_BlitzFirst.sql

@@ -4456,8 +4456,8 @@ If one of them is a lead blocker, consider killing that query.'' AS HowToStopit,
                     [FindingsGroup] ,
                     [Finding] ,
                     [URL] ,
-                    CAST(@StockDetailsHeader + [Details] + @StockDetailsFooter AS NVARCHAR(MAX)) AS Details,
-                    CAST([HowToStopIt] AS NVARCHAR(MAX)) AS HowToStopIt,
+                    CAST(LEFT(@StockDetailsHeader + [Details] + @StockDetailsFooter,32000) AS TEXT) AS Details,
+                    CAST(LEFT([HowToStopIt],32000) AS TEXT) AS HowToStopIt,
                     CAST([QueryText] AS NVARCHAR(MAX)) AS QueryText,
                     CAST([QueryPlan] AS NVARCHAR(MAX)) AS QueryPlan
             FROM    #BlitzFirstResults