Fix usage of spaces for package names in composer search/composer require commands

[realFlowControl]

Hello there 🖖

I found out while using composer search that I can not search for two words with a space in between:

$ composer search ramsey commits

[Composer\Downloader\TransportException]
curl error 3 while downloading https://packagist.org/search.json?q=ramsey commits&type=: URL using bad/illegal format or missing URL

search [-N|--only-name] [-t|--type TYPE] [-f|--format FORMAT] [--] <tokens> (<tokens>)...

Same is true for using composer require:

$ composer require
Search for a package: ramsey commits

[Composer\Downloader\TransportException]
curl error 3 while downloading https://packagist.org/search.json?q=ramsey commits&type=: URL using bad/illegal format or missing URL

I do not know for the composre require command, but for the composer search command such a usage is documented via the composer help search command, so I assumed it is the expected behavior for this to work.

With this PR applied those two commands behave as following:

$ ./bin/composer require
Search for a package: ramsey commits

Found 1 packages matching ramsey commits

   [0] ramsey/conventional-commits

Enter package # to add, or the complete package name if it is not listed:
[...]

and

./bin/composer search ramsey commits
ramsey/conventional-commits A PHP library for creating and validating commit messages according to the Conventional Commits specification. In...

What do you think?

Kind regards
Florian

[Seldaek]

Weird because I cannot reproduce this:

$ composer search ramsey commits -vvv
[...]
Downloading https://packagist.org/search.json?q=ramsey commits&type=
[200] https://packagist.org/search.json?q=ramsey commits&type=
ramsey/conventional-commits A PHP library for creating and validating commit messages according to the Conventional Commits specification. Includes a CaptainHook action!

That said, it makes absolute sense to urlencode here regardless of space handling, so thanks :)