Update Collection.php

Minor DocBlock correction
Fix for 6151 - Match patterns now look for any non-whitespace character after the separator.
Merge branch 'hotfix/#6158-typo-fix'

Close #6158
add support number of string in __construct of Priority
remove twice registered "zendframework/zend-session" in composer.json
Merge pull request #6163
Merge pull request #6163 in develop
Merge pull request #6163 in master
Merge pull request #6159
Merge pull request #6159 in master
Merge pull request #6159 in develop
Merge pull request #6149
Merge pull request #6149 in master
Merge pull request #6149 in develop
Fix: Add missing throws tags
Fix: Fix PHP-CS-Fixer to a working version
Merge pull request #6180
Merge pull request #6180 in master
Merge pull request #6180 in develop
Merge pull request #6164