Fix minor, PHPStan warnings fixed

Author: prusov-code

src/CalcGame.php

@@ -28,7 +28,7 @@ function startCalcGame(): void
                 $expressionResult = $number1 * $number2;
                 break;
         }
-        $expression = "{$number1} {$operation} {$number2}";
+        $expression = "$number1 $operation $number2";
         $questions[$i] = $expression;
         $answers[$i] = $expressionResult;
     }

src/Cli.php

@@ -9,7 +9,7 @@ function sayGreeting(string $gameDescription = ''): string
 {
     line('Welcome to the Brain Games!');
     $name = prompt('May I have your name?');
-    line("Hello, {$name}!");
+    line("Hello, $name!");
     if (!empty($gameDescription)) {
         line($gameDescription);
     }
@@ -18,19 +18,19 @@ function sayGreeting(string $gameDescription = ''): string
 
 function sayCongratulions(string $userName): void
 {
-    line("Congratulations, {$userName}!");
+    line("Congratulations, $userName!");
 }
 
 function sayUserLose(string $userAnswer, string $correctAnswer, string $userName): void
 {
-    line("'{$userAnswer}' is wrong answer ;(. Correct answer was '{$correctAnswer}'.");
-    line("Let's try again, {$userName}!");
+    line("'$userAnswer' is wrong answer ;(. Correct answer was '$correctAnswer'.");
+    line("Let's try again, $userName!");
 }
 
 function askQuestion(mixed $question): string
 {
-    line("Question: {$question}");
-    return prompt("Your answer",);
+    line("Question: $question");
+    return prompt("Your answer");
 }
 
 function playGame(array $questions, array $correctAnswers, string $gameDescription): void

src/GcdGame.php

@@ -12,7 +12,7 @@ function startGcdGame(): void
         $number1 = rand(1, 100);
         $number2 = rand(1, 100);
 
-        $questions[$i] = "{$number1} {$number2}";
+        $questions[$i] = "$number1 $number2";
         $answers[$i] = findGcd($number1, $number2);
     }
     playGame($questions, $answers, 'Find the greatest common divisor of given numbers.');

src/ProgressionGame.php

@@ -24,7 +24,7 @@ function startProgressionGame(): void
     playGame($questions, $answers, 'What number is missing in the progression?');
 }
 
-function getProgressionElement(int $index, int $progressionStartNumber, int $progressionStep)
+function getProgressionElement(int $index, int $progressionStartNumber, int $progressionStep): int
 {
     return $progressionStartNumber + $index * $progressionStep;
 }