fcl-mustache: incorrect newlines in output
## Summary
TMustache renders a list sometimes with and sometimes without extra newlines.
## System Information
- **Operating system:** Linux, Ubuntu 21.10
- **Processor architecture:** x86-64
- **Compiler version:** 3.2.2+dfsg-1ubuntu2
## Steps to reproduce
```pascal
program reproduce;
uses jsonparser, fpmustache;
const
LF = #10;
Template =
'{{#list}}' + LF +
'* {{.}}' + LF +
'{{/list}}' + LF +
'{{#list}}' + LF +
'* {{.}}' + LF +
'{{/list}}';
Json = '{ "list": [ "one", "two", "three" ] }';
begin
WriteLn(TMustache.Render(Template, Json));
ReadLn;
end.
```
## Example Project
So the template is:
```
{{#list}}
* {{.}}
{{/list}}
{{#list}}
* {{.}}
{{/list}}
```
## What is the current bug behavior?
The template contains two exactly the same lists, however, the rendering is one time with extra newlines and one time without.
The rendering is:
```
* one
* two
* three
* one
* two
* three
```
## What is the expected (correct) behavior?
Correct rendering is:
```
* one
* two
* three
* one
* two
* three
```
http://rickkas7.github.io/mustache/ yields the correct rendering with the same template and JSON data.
issue