[Routing] Fixes to handle spaces in route pattern

- The route compiler does not add extra space or line-feed,
- The generated regex does not use the 'x' modified any more,
- The PHP and apache matchers do not need to strip any chars (vs space and line feed before),
- The space characters are escaped according to the apache format
merged branch vicb/routing_dumpers (PR #3858)

Commits
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77185e0 [Routing] Allow spaces in the script name for the apache dumper
6465a69 [Routing] Fixes to handle spaces in route pattern

Discussion
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[Routing] Handling of space characters in the dumpers

The compiler was using the 'x' modifier in order to ignore extra spaces and line feeds but the code was flawed:

- it was actually ignoring all the spaces, not only the extra ones added by the compiler,
- all the spaces were stripped in the php and apache matchers.

The proposed fix:

- do not use the 'x' modifier any more (and then do no add extra spaces / line feeds),
- do not strip the spaces in the matchers,
- escapes the spaces (both in regexs and script name) for the apache matcher.

It also include [a small optimization](https://github.com/vicb/symfony/pull/new#L9L89) when the only token of a route is an optional variable token - the idea is to make the regex easier to read.

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by vicb at 2012-04-10T13:59:45Z

@Baachi fixed now. Thanks.

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by Tobion at 2012-04-10T16:01:31Z

+1, I saw no reason for pretty printing the regex in the first place (just for debugging I guess).
@vicb since you want to make the regex easier to read, I propose the remove the `P` from the variable regex `?P<bar>`, which is not needed anymore in PHP 5.3 (and we only support PHP 5.3+ anyway).

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by vicb at 2012-04-10T16:08:36Z

@Tobion could you make a PR to this branch for the named parameters ?

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by Tobion at 2012-04-10T16:12:34Z

I can include it in #3754 because I'm about the add 2 more fixes to it anyway.
But when I proposed to apply these fixes to 2.0 Fabien rejected it. So not sure what branch you want me to apply this.

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by vicb at 2012-04-10T16:25:38Z

May be the best is to put it on hold while I am reviewing your PRs. There are already enough changes, we'll make an other PR after all have been sorted out.

What's the difference between 3754 and 3810 ? (3810 + 3763 = 3754 ?)

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by Tobion at 2012-04-10T16:39:32Z

Lol you forget to link the PR numbers. At first sight I thought it's some sort of mathematical riddle. Haha
#3810 is for 2.0 =  #3763 (already merged) + #3754 for master

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by vicb at 2012-04-10T16:52:18Z

I didn't link on purpose... the question is if '=' means strictly or loosely equal (any diffs - beside master vs 2.0) ?

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by Tobion at 2012-04-10T17:06:04Z

It just applies my changes to 2.0. Nothing more. So master still differs from 2.0 by the addional features that were already implemented (e.g. `RouteCollection->addCollection` with optional requirements and options). But since my changes are bug fixes (except the performance improvement in #3763 but that doesn't break anything and makes 2.0 easier to maintain) I thought they should go into 2.0 as well.

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by vicb at 2012-04-10T17:14:27Z

@Tobion only bug fixes mean "only bug fixes". You should re-open a PR for 2.0 with "only bug fixes", you might want to wait for me to review 3754.

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by Tobion at 2012-04-10T17:21:00Z

Without #3763 it's much harder to apply the bug fixes. And now that I found 2 more bugs which requiresome rewriting of the PhpMatcherDumper, I don't want to apply all the commits by hand again for 2.0...
fixed CS