Removed all codeCoverageIgnore annotations from the code

These annotations are artificially bumping the code coverage. Unreached
code should be reported in the coverage report, even if we cannot reach
100% coverage for some safeguards.
Thus, some places using them were actually testable (and tested) code.

Author: stof

Application.php

@@ -145,9 +145,8 @@ public function run(InputInterface $input = null, OutputInterface $output = null
             if ($exitCode > 255) {
                 $exitCode = 255;
             }
-            // @codeCoverageIgnoreStart
+
             exit($exitCode);
-            // @codeCoverageIgnoreEnd
         }
 
         return $exitCode;

Input/StringInput.php

@@ -72,9 +72,7 @@ private function tokenize($input)
                 $tokens[] = stripcslashes($match[1]);
             } else {
                 // should never happen
-                // @codeCoverageIgnoreStart
                 throw new \InvalidArgumentException(sprintf('Unable to parse input near "... %s ..."', substr($input, $cursor, 10)));
-                // @codeCoverageIgnoreEnd
             }
 
             $cursor += strlen($match[0]);

Output/StreamOutput.php

@@ -75,10 +75,8 @@ public function getStream()
     protected function doWrite($message, $newline)
     {
         if (false === @fwrite($this->stream, $message.($newline ? PHP_EOL : ''))) {
-            // @codeCoverageIgnoreStart
             // should never happen
             throw new \RuntimeException('Unable to write output.');
-            // @codeCoverageIgnoreEnd
         }
 
         fflush($this->stream);
@@ -96,12 +94,10 @@ protected function doWrite($message, $newline)
      */
     protected function hasColorSupport()
     {
-        // @codeCoverageIgnoreStart
         if (DIRECTORY_SEPARATOR == '\\') {
             return false !== getenv('ANSICON') || 'ON' === getenv('ConEmuANSI');
         }
 
         return function_exists('posix_isatty') && @posix_isatty($this->stream);
-        // @codeCoverageIgnoreEnd
     }
 }