Commenting.DataTypeNamespace sniff can return the same error more than once

The Commenting.DataTypeNamespace sniff tries to match each use statement against each @var, @param and @return statement to check that they are fully namespaced. However, the way that it is coded currently can lead to matches with more than one 'use' statement and we get the same error reported more than once. Take this real snippet from Rules module http://cgit.drupalcode.org/rules/tree/tests/src/Unit/Integration/Action/...

use Drupal\rules\Engine\RulesComponent;
use Drupal\rules\Entity\RulesComponentConfig;

then later

   * @param RulesComponentConfig[] $rules_configs

The method for matching involves the if clause strpos($tokens[($tag + 2)]['content'], $tokens[$classPtr]['content']) === 0 where $tokens[($tag + 2) is going to be RulesComponentConfig[] $rules_configs and $tokens[$classPtr] will be the class name in the use statement. The strPos( ) line matches both of these use statements, when it should match only 'RulesComponentConfig'. This is because 'RulesComponent' is a substring of 'RulesComponentConfig' which also starts at position 0.

Maybe we shoud explode $tokens[($tag + 2)]['content'] on space and [ ] and then check the value directly, instead of using strPos()