When we have some simple markdown files like with extra spaces (after…

… `\aa2`, `\bb2` and `\ccs2` to give in markdown a newline):

```
First test: 2 extra spaces after first line with error no extra empty lines
\aa2
\aa3
```
and
```
First test: 2 extra spaces after first line with error one extra empty line
\bb2

\bb4
```
and
```
First test: 2 extra spaces after first line with error two extra empty lines
\cc2

\cc5
```
we get warnings like:
```
.../aa.md:2: warning: Found unknown command '\aa2'
.../aa.md:4: warning: Found unknown command '\aa3'
.../bb.md:2: warning: Found unknown command '\bb2'
.../bb.md:5: warning: Found unknown command '\bb4'
.../cc.md:2: warning: Found unknown command '\cc2'
.../cc.md:6: warning: Found unknown command '\cc5'
```
whilst this should be:
```
.../aa.md:2: warning: Found unknown command '\aa2'
.../aa.md:3: warning: Found unknown command '\aa3'
.../bb.md:2: warning: Found unknown command '\bb2'
.../bb.md:4: warning: Found unknown command '\bb4'
.../cc.md:2: warning: Found unknown command '\cc2'
.../cc.md:5: warning: Found unknown command '\cc5'
```
This has been corrected by placing the `<br>` straight after the extra spaces and by not adding an extra newline.

src/markdown.cpp

@@ -2070,11 +2070,15 @@ void Markdown::writeOneLineHeaderOrRuler(const char *data,int size)
   }
   else // nothing interesting -> just output the line
   {
-    m_out.addStr(data,size);
+    int tmpSize = size;
+    if (data[size-1] == '\n') tmpSize--;
+    m_out.addStr(data,tmpSize);
+
     if (hasLineBreak(data,size))
     {
-      m_out.addStr("<br>\n");
+      m_out.addStr("<br>");
     }
+    if (tmpSize != size) m_out.addChar('\n');
   }
 }