Normalize whitespace around colons in type hints and return types in tests.

Author: Mcainson

tests/Go/Instrument/Transformer/WeavingTransformerTest.php

@@ -217,6 +217,7 @@ public function testMultipleClasses(): void
      */
     protected function normalizeWhitespaces(string $value): string
     {
+        $value = preg_replace('/\)\s*:\s*(\S)/', '): $1', $value);
         return strtr(
             preg_replace('/\s+$/m', '', $value),
             [

tests/Go/Proxy/Part/InterceptedMethodGeneratorTest.php

@@ -40,6 +40,9 @@ public function testGenerate(string $className, string $methodName, string $expe
         $generatedCode = preg_replace('#/\*.+?\*/#s', '', $generatedCode);
         // Remove trailing spaces and empty function body
         $generatedCode = trim($generatedCode, "\n{} ");
+
+        $generatedCode       = preg_replace('/\s*:\s*(\S)/', ': $1', $generatedCode);
+        $expectedSignature   = preg_replace('/\s*:\s*(\S)/', ': $1', $expectedSignature);
         $this->assertSame($expectedSignature, $generatedCode);
     }