trailing spaces in code block
gruber at fedora.net
Thu Jun 22 13:46:20 EDT 2006
John MacFarlane <jgm at berkeley.edu> wrote on 6/14/06 at 3:12 PM:
> It seems that Markdown 1.0.1 strips off trailing spaces at the end of
> code blocks. Is this really what it's supposed to do? There might be
> reasons to include trailing spaces in code displayed on a web page --
> for example, in demonstrating how to do a hard line break in markdown.
> Even if the trailing spaces aren't visible, they can be cut and
> pasted. Besides, Markdown 1.0.1 preserves trailing spaces on
> every line except the last line of a code block. Is there a reason
> to treat the last line differently?
No, I don't think so. If there is a reason that I implemented it
this way, I have forgotten it, and I can't think of any reason it
should act like this, so I'm calling it a bug in Markdown.pl. (And
in Markdown.php, too, for obvious reasons.)
The fix is easy. Inside _DoCodeBlocks(), change this:
$codeblock =~ s/\s+\z//; # trim trailing whitespace
$codeblock =~ s/\n+\z//; # trim trailing newlines
> The reason I ask is that I've written an implementation of markdown in
> haskell. It passes all of the tests in the test suite except "Markdown
> Documentation - Syntax.text", which it fails because it retains the
> trailing spaces in the code block at line 572. I could of course change
> it to remove trailing spaces in code blocks, but if this is a bug and
> not a feature, I'd rather see the test suite changed. Any thoughts?
Yup. Just remove the spurious spaces at the end of line 572 in
"Markdown > Documentation - Syntax.text".
I'll also add a test to test this "preserve spaces on the last
line of a code block" fix.
Thanks for reporting this John. When (if?) you release your
Haskell port, be sure to add it to the list of implementations
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