Replace all occurrences of
```foo
{% raw %}
bar
{% endraw %}
```
(which generates spurious empty lines in the rendered pre block) with
{% raw %}
```foo
bar
```
{% endraw %}
Also, fix some occurrences where the raw section is too large and
prevented interpretation of Jekyll directives.
This is the syntax used in the documentation of Jekyll itself:
https://raw.githubusercontent.com/jekyll/jekyll/master/docs/_docs/templates.md
FTR, done with two perl substitutions:
'^([\t ]*```[^\n]*
)([ \t]*\{% raw %\}[^\n]*
)' '$2$1'
and
'^([ \t]*\{% endraw %\}[^\n]*
)([\t ]*```[^\n]*
)' '$2$1'
and manually tweaks. A mechanical check would be most useful.
Signed-off-by: Akim Demaille <akim.demaille@docker.com>