minor #27868 improve deprecation messages (xabbuh)

This PR was merged into the 3.4 branch.

Discussion
----------

improve deprecation messages

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
-------

a3845c7 improve deprecation messages

Application.php

@@ -807,7 +807,7 @@ protected function doRenderException(\Exception $e, OutputInterface $output)
      */
     protected function getTerminalWidth()
     {
-        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('The "%s()" method is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
 
         return $this->terminal->getWidth();
     }
@@ -821,7 +821,7 @@ protected function getTerminalWidth()
      */
     protected function getTerminalHeight()
     {
-        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('The "%s()" method is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
 
         return $this->terminal->getHeight();
     }
@@ -835,7 +835,7 @@ protected function getTerminalHeight()
      */
     public function getTerminalDimensions()
     {
-        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('The "%s()" method is deprecated as of 3.2 and will be removed in 4.0. Create a Terminal instance instead.', __METHOD__), E_USER_DEPRECATED);
 
         return array($this->terminal->getWidth(), $this->terminal->getHeight());
     }
@@ -854,7 +854,7 @@ public function getTerminalDimensions()
      */
     public function setTerminalDimensions($width, $height)
     {
-        @trigger_error(sprintf('%s is deprecated as of 3.2 and will be removed in 4.0. Set the COLUMNS and LINES env vars instead.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('The "%s()" method is deprecated as of 3.2 and will be removed in 4.0. Set the COLUMNS and LINES env vars instead.', __METHOD__), E_USER_DEPRECATED);
 
         putenv('COLUMNS='.$width);
         putenv('LINES='.$height);