diff --git a/components/aissist/ide/frmaissistfpdocedit.pas b/components/aissist/ide/frmaissistfpdocedit.pas
index 6975725714..38e5df1531 100644
--- a/components/aissist/ide/frmaissistfpdocedit.pas
+++ b/components/aissist/ide/frmaissistfpdocedit.pas
@@ -7,7 +7,7 @@ interface
 uses
   Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls,
   // aissist
-  AIClient, FrmAixplain, LazLoggerBase;
+  AIClient, FrmAixplain, StrAIssist, LazLoggerBase, CTXMLFixFragment;
 
 const
   SDescribeProcPrompt = 'Explain the following function in one sentence:';
@@ -71,12 +71,33 @@ begin
 end;
 
 procedure TAIssistFPDocEditDlg.HandleAIResponse(Sender: TObject; aResponses: TPromptResponseArray);
+
+var
+  S : TStrings;
+
 begin
-  inherited HandleAIResponse(Sender, aResponses);
+  FBusy:=False;
+  ActivateResponse;
   if Length(AResponses)=0 then
-    Description:=''
+    begin
+    Description:='';
+    mExplain.Lines.Add(SNoExplanation);
+    end
   else
+    begin
     Description:=aResponses[0].Response;
+
+    FixFPDocFragment(Description,true,true,nil,[fffRemoveWrongCloseTags]);
+
+    mExplain.Lines.Add(SAIExplanation);
+    S:=TStringList.Create;
+    try
+      S.Text:=Description;
+      mExplain.Lines.AddStrings(S);
+    finally
+      S.Free;
+    end;
+    end;
   DebugLn(['TAIssistFPDocEditDlg.HandleAIResponse Description="',Description,'"']);
 end;
 
diff --git a/components/codetools/ctxmlfixfragment.pas b/components/codetools/ctxmlfixfragment.pas
index 303c2fcbbe..92c6fb0d56 100644
--- a/components/codetools/ctxmlfixfragment.pas
+++ b/components/codetools/ctxmlfixfragment.pas
@@ -34,18 +34,29 @@ uses
   Classes, SysUtils, FileProcs, contnrs, BasicCodeTools;
 
 type
+  TFixFPDocFlag = (
+    fffVerbose, // write debugln to stdout
+    fffRemoveWrongCloseTags // remove all close tags which were not open, default: convert to text
+    );
+  TFixFPDocFlags = set of TFixFPDocFlag;
   PObjectList = ^TObjectList;
 
 procedure FixFPDocFragment(var Fragment: string;
   AllowTags,    // for attribute values set this to false, so that all < are converted
   Fix: boolean; // fix errors using heuristics creating valid xml
   ErrorList: PObjectList = nil;
-  Verbose: boolean = false // write debugln to stdout
-  );
+  Flags: TFixFPDocFlags = []);
 procedure FixFPDocAttributeValue(var Value: string);
 
 implementation
 
+const
+  LowerAlpha = ['a'..'z'];
+  UpperAlpha = ['A'..'Z'];
+  Alpha = LowerAlpha+UpperAlpha;
+  Digit = ['0'..'9'];
+  InvalidChars = [#0..#8,#11,#12,#14..#31,#127];
+  Space = [' ',#9,#10,#13];
 
 type
   TFPDocFragmentError = class
@@ -54,9 +65,9 @@ type
     Msg: string;
   end;
 
-procedure FixFPDocFragment(var Fragment: string; AllowTags, Fix: boolean;
-  ErrorList: PObjectList; Verbose: boolean);
-{ - Fix all tags to lowercase to reduce svn commits
+procedure FixFPDocFragment(var Fragment: string; AllowTags, Fix: boolean; ErrorList: PObjectList;
+  Flags: TFixFPDocFlags);
+{ - Fix all tags to lowercase to reduce git commits
   - auto close comments
   - remove #0 from comments
   - convert special characters to &x;
@@ -102,7 +113,7 @@ var
     NewError: TFPDocFragmentError;
     LineStart,LineEnd: integer;
   begin
-    if Verbose then begin
+    if fffVerbose in Flags then begin
       debugln(['Error at ',LineCol(Rel(ErrorPos)),': ',ErrorMsg]);
       GetLineStartEndAtPosition(Fragment,Rel(ErrorPos),LineStart,LineEnd);
       debugln(['  Line: ',copy(Fragment,LineStart,Rel(ErrorPos)-LineStart),'|',
@@ -201,7 +212,7 @@ var
     inc(p,4);
     // parse comment
     repeat
-      if p^ in [#0..#8,#11,#12,#14..#31,#127] then begin
+      if p^ in InvalidChars then begin
         // invalid character in comment => delete
         if (p^=#0) and (p-PChar(Fragment)=length(Fragment)) then
         begin
@@ -246,7 +257,7 @@ var
         // decimal number
         inc(p);
         i:=ord(p^)-ord('0');
-        while p^ in ['0'..'9'] do
+        while p^ in Digit do
         begin
           i:=i+10+ord(p^)-ord('0');
           if i>$10FFFF then
@@ -265,8 +276,8 @@ var
         // name
         inc(p);
         NeedLowercase:=nil;
-        while p^ in ['a'..'z','A'..'Z'] do begin
-          if (NeedLowercase=nil) and (p^ in ['A'..'Z']) then
+        while p^ in Alpha do begin
+          if (NeedLowercase=nil) and (p^ in UpperAlpha) then
             NeedLowercase:=p;
           inc(p);
         end;
@@ -323,7 +334,7 @@ var
   begin
     // read attribute name
     LowerCaseName;
-    while p^ in [' ',#9,#10,#13] do inc(p); // skip space
+    while p^ in Space do inc(p); // skip space
     if p^<>'=' then begin
       // missing value
       Error(p,'expected =');
@@ -333,7 +344,7 @@ var
     if p^='=' then begin
       // read equal
       inc(p);
-      while p^ in [' ',#9,#10,#13] do inc(p); // skip space
+      while p^ in Space do inc(p); // skip space
       if not (p^ in ['"','''']) then begin
         // missing quote
         Error(p,'expected "');
@@ -373,8 +384,9 @@ var
   procedure ParseCloseTag;
   var
     i: LongInt;
+    EndP: PChar;
   begin
-    if (p^<>'<') or (p[1]<>'/') or (not (p[2] in ['a'..'z','A'..'Z'])) then
+    if (p^<>'<') or (p[1]<>'/') or (not (p[2] in Alpha)) then
     begin
       HandleSpecialChar;
       exit;
@@ -387,7 +399,14 @@ var
     if i<0 then begin
       // no corresponding open tag
       Error(p,'tag was never opened');
-      HandleSpecialChar;
+      if fffRemoveWrongCloseTags in Flags then begin
+        EndP:=p+2;
+        while EndP^ in Alpha do inc(EndP);
+        if EndP='>' then
+          inc(EndP);
+        Replace(Rel(p),EndP-p,'');
+      end else
+        HandleSpecialChar;
       exit;
     end;
     TopItem^.CloseStartPos:=Rel(p);
@@ -406,7 +425,7 @@ var
       dec(i);
     end;
     // skip space
-    while (p^ in [' ',#9,#10,#13]) do inc(p);
+    while (p^ in Space) do inc(p);
     if p^='/' then begin
       // uneeded close /
       Error(p,'invalid close /');
@@ -432,7 +451,7 @@ var
     inc(p);
     LowerCaseName;
     repeat
-      while p^ in [' ',#9,#10,#13] do inc(p); // skip space
+      while p^ in Space do inc(p); // skip space
       case p^ of
       'a'..'z','A'..'Z':
         ParseAttribute;
@@ -479,7 +498,7 @@ var
     end else if (p[1]='!') and (p[2]='-') and (p[3]='-') then begin
       // comment
       ParseComment;
-    end else if p[1] in ['a'..'z','A'..'Z'] then begin
+    end else if p[1] in Alpha then begin
       // start tag
       ParseOpenTag;
     end else if p[1]='/' then begin
diff --git a/components/codetools/tests/testctxmlfixfragments.pas b/components/codetools/tests/testctxmlfixfragments.pas
index 0a633cf311..87928d7adf 100644
--- a/components/codetools/tests/testctxmlfixfragments.pas
+++ b/components/codetools/tests/testctxmlfixfragments.pas
@@ -22,7 +22,7 @@ type
 
   TTestCTXMLFixFragment = class(TTestCase)
   protected
-    function TestFrag(Title, Fragment, FixedFragment: string): boolean;
+    function TestFrag(Title, Fragment, FixedFragment: string; Flags: TFixFPDocFlags = []): boolean;
     function TestAttr(Title, Value, FixedValue: string): boolean;
   published
     procedure TestFixXMLFragmentComment;
@@ -39,14 +39,14 @@ implementation
 
 { TTestCTXMLFixFragment }
 
-function TTestCTXMLFixFragment.TestFrag(Title, Fragment, FixedFragment: string
-  ): boolean;
+function TTestCTXMLFixFragment.TestFrag(Title, Fragment, FixedFragment: string;
+  Flags: TFixFPDocFlags): boolean;
 var
   s: String;
 begin
   Result:=true;
   s:=Fragment;
-  FixFPDocFragment(s,true,true,nil,false);
+  FixFPDocFragment(s,true,true,nil,Flags);
   AssertEquals(Title+' fragment: '+DbgStr(Fragment),dbgstr(FixedFragment),dbgstr(s));
 end;
 
@@ -101,6 +101,7 @@ begin
   TestFrag('close open tag','<a>','<a/>');
   TestFrag('close open sub tag','<p><a></p>','<p><a/></p>');
   TestFrag('disable invalid close tag','</p>','&lt;/p&gt;');
+  TestFrag('remove invalid close tag','bla</s>','bla',[fffRemoveWrongCloseTags]);
 end;
 
 procedure TTestCTXMLFixFragment.TestFixXMLFragmentBugReports;
diff --git a/ide/fpdoceditwindow.pas b/ide/fpdoceditwindow.pas
index 4dfa2a7912..5b8bffb711 100644
--- a/ide/fpdoceditwindow.pas
+++ b/ide/fpdoceditwindow.pas
@@ -1042,6 +1042,7 @@ begin
     Btn.Caption:=LazarusHelp.FPDocEditorTextBtnHandlers[i].Caption;
     Btn.Hint:=LazarusHelp.FPDocEditorTextBtnHandlers[i].Hint;
     Btn.ShowHint:=Btn.Hint>'';
+    Btn.Enabled:=HasEdit;
   end;
   for i:=length(FCustomSpeedButtons)-1 downto Cnt do
     FCustomSpeedButtons[i].Free;
@@ -1648,6 +1649,7 @@ begin
   OnExec(Params);
   if not Params.Success then exit;
 
+  // insert text
   case Params.Part of
     fpdepShortDesc:
       begin