Fix handling of --covers / --uses CLI options with function targets

Author: sebastianbergmann

src/Metadata/Api/Groups.php

@@ -13,6 +13,7 @@
 use function array_key_exists;
 use function array_unique;
 use function assert;
+use function ltrim;
 use function strtolower;
 use function trim;
 use PHPUnit\Framework\TestSize\TestSize;
@@ -69,7 +70,7 @@ public function groups(string $className, string $methodName, bool $includeVirtu
                 /** @phpstan-ignore booleanOr.alwaysTrue */
                 assert($metadata instanceof CoversClass || $metadata instanceof CoversFunction);
 
-                $groups[] = '__phpunit_covers_' . $this->canonicalizeName($metadata->asStringForCodeUnitMapper());
+                $groups[] = '__phpunit_covers_' . $this->canonicalizeName(ltrim($metadata->asStringForCodeUnitMapper(), ':'));
 
                 continue;
             }
@@ -86,7 +87,7 @@ public function groups(string $className, string $methodName, bool $includeVirtu
                 /** @phpstan-ignore booleanOr.alwaysTrue */
                 assert($metadata instanceof UsesClass || $metadata instanceof UsesFunction);
 
-                $groups[] = '__phpunit_uses_' . $this->canonicalizeName($metadata->asStringForCodeUnitMapper());
+                $groups[] = '__phpunit_uses_' . $this->canonicalizeName(ltrim($metadata->asStringForCodeUnitMapper(), ':'));
 
                 continue;
             }