minor symfony#12783 Fixed the syntax of a composer.json file (GrahamCampbell)

This PR was merged into the 2.3 branch.

Discussion
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Fixed the syntax of a composer.json file

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | N/A

##### This pull request fixes the syntax of a composer.json file.

There should not be a space before a colon following a double quote. This is not bad syntax, but it just an inconsistency.

Commits
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0f8547a Fixed the syntax of a composer.json file

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/composer.json

@@ -17,8 +17,8 @@
     ],
     "require": {
         "php": ">=5.3.3",
-        "symfony/dependency-injection" : "~2.2",
-        "symfony/config" : "~2.2",
+        "symfony/dependency-injection": "~2.2",
+        "symfony/config": "~2.2",
         "symfony/event-dispatcher": "~2.1",
         "symfony/http-kernel": "~2.3",
         "symfony/filesystem": "~2.3",