Add return types - batch 1/n

Author: nicolas-grekas

Command/LintCommand.php

@@ -81,7 +81,7 @@ protected function configure()
         ;
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);
         $filenames = (array) $input->getArgument('filename');

Exception/ParseException.php

@@ -46,7 +46,7 @@ public function __construct(string $message, int $parsedLine = -1, string $snipp
      *
      * @return string The snippet of code
      */
-    public function getSnippet()
+    public function getSnippet(): string
     {
         return $this->snippet;
     }
@@ -68,7 +68,7 @@ public function setSnippet(string $snippet)
      *
      * @return string The filename
      */
-    public function getParsedFile()
+    public function getParsedFile(): string
     {
         return $this->parsedFile;
     }
@@ -88,7 +88,7 @@ public function setParsedFile(string $parsedFile)
      *
      * @return int The file line
      */
-    public function getParsedLine()
+    public function getParsedLine(): int
     {
         return $this->parsedLine;
     }