[CLEANUP] Rector: Change return type based on strict scalar returns - string, int, float or bool (#589)

This applies the rule ReturnTypeFromStrictScalarReturnExprRector. For
Details see:
https://github.com/rectorphp/rector/blob/main/docs/rector_rules_overview.md#returntypefromstrictscalarreturnexprrector

Signed-off-by: Daniel Ziegenberg <daniel@ziegenberg.at>

Author: ziegenberg

src/CSSList/AtRuleBlockList.php

@@ -56,10 +56,7 @@ public function __toString()
         return $this->render(new OutputFormat());
     }
 
-    /**
-     * @return string
-     */
-    public function render(OutputFormat $oOutputFormat)
+    public function render(OutputFormat $oOutputFormat): string
     {
         $sResult = $oOutputFormat->comments($this);
         $sResult .= $oOutputFormat->sBeforeAtRuleBlock;

src/CSSList/Document.php

@@ -144,10 +144,8 @@ public function createShorthands()
      * Overrides `render()` to make format argument optional.
      *
      * @param OutputFormat|null $oOutputFormat
-     *
-     * @return string
      */
-    public function render(OutputFormat $oOutputFormat = null)
+    public function render(OutputFormat $oOutputFormat = null): string
     {
         if ($oOutputFormat === null) {
             $oOutputFormat = new OutputFormat();

src/CSSList/KeyFrame.php

@@ -67,10 +67,7 @@ public function __toString()
         return $this->render(new OutputFormat());
     }
 
-    /**
-     * @return string
-     */
-    public function render(OutputFormat $oOutputFormat)
+    public function render(OutputFormat $oOutputFormat): string
     {
         $sResult = $oOutputFormat->comments($this);
         $sResult .= "@{$this->vendorKeyFrame} {$this->animationName}{$oOutputFormat->spaceBeforeOpeningBrace()}{";

src/Comment/Comment.php

@@ -61,10 +61,7 @@ public function __toString()
         return $this->render(new OutputFormat());
     }
 
-    /**
-     * @return string
-     */
-    public function render(OutputFormat $oOutputFormat)
+    public function render(OutputFormat $oOutputFormat): string
     {
         return '/*' . $this->sComment . '*/';
     }

src/OutputFormatter.php

@@ -166,10 +166,8 @@ public function safely($cCode)
      * @param string $sSeparator
      * @param array<array-key, Renderable|string> $aValues
      * @param bool $bIncreaseLevel
-     *
-     * @return string
      */
-    public function implode($sSeparator, array $aValues, $bIncreaseLevel = false)
+    public function implode($sSeparator, array $aValues, $bIncreaseLevel = false): string
     {
         $sResult = '';
         $oFormat = $this->oFormat;
@@ -218,7 +216,7 @@ public function removeLastSemicolon($sString)
      *
      * @return string
      */
-    public function comments(Commentable $oCommentable)
+    public function comments(Commentable $oCommentable): string
     {
         if (!$this->oFormat->bRenderComments) {
             return '';
@@ -248,7 +246,7 @@ private function prepareSpace($sSpaceString)
     /**
      * @return string
      */
-    private function indent()
+    private function indent(): string
     {
         return str_repeat($this->oFormat->sIndentation, $this->oFormat->level());
     }

src/Parsing/ParserState.php

@@ -457,10 +457,8 @@ public function strlen($sString): int
     /**
      * @param int $iStart
      * @param int $iLength
-     *
-     * @return string
      */
-    private function substr($iStart, $iLength)
+    private function substr($iStart, $iLength): string
     {
         if ($iLength < 0) {
             $iLength = $this->iLength - $iStart + $iLength;
@@ -479,10 +477,8 @@ private function substr($iStart, $iLength)
 
     /**
      * @param string $sString
-     *
-     * @return string
      */
-    private function strtolower($sString)
+    private function strtolower($sString): string
     {
         if ($this->oParserSettings->bMultibyteSupport) {
             return mb_strtolower($sString, $this->sCharset);

src/Property/CSSNamespace.php

@@ -59,10 +59,7 @@ public function __toString()
         return $this->render(new OutputFormat());
     }
 
-    /**
-     * @return string
-     */
-    public function render(OutputFormat $oOutputFormat)
+    public function render(OutputFormat $oOutputFormat): string
     {
         return '@namespace ' . ($this->sPrefix === null ? '' : $this->sPrefix . ' ')
             . $this->mUrl->render($oOutputFormat) . ';';
@@ -107,7 +104,7 @@ public function setPrefix($sPrefix)
     /**
      * @return string
      */
-    public function atRuleName()
+    public function atRuleName(): string
     {
         return 'namespace';
     }

src/Property/Charset.php

@@ -77,18 +77,12 @@ public function __toString()
         return $this->render(new OutputFormat());
     }
 
-    /**
-     * @return string
-     */
-    public function render(OutputFormat $oOutputFormat)
+    public function render(OutputFormat $oOutputFormat): string
     {
         return "{$oOutputFormat->comments($this)}@charset {$this->oCharset->render($oOutputFormat)};";
     }
 
-    /**
-     * @return string
-     */
-    public function atRuleName()
+    public function atRuleName(): string
     {
         return 'charset';
     }

src/Property/Import.php

@@ -78,19 +78,13 @@ public function __toString()
         return $this->render(new OutputFormat());
     }
 
-    /**
-     * @return string
-     */
-    public function render(OutputFormat $oOutputFormat)
+    public function render(OutputFormat $oOutputFormat): string
     {
         return $oOutputFormat->comments($this) . "@import " . $this->oLocation->render($oOutputFormat)
             . ($this->sMediaQuery === null ? '' : ' ' . $this->sMediaQuery) . ';';
     }
 
-    /**
-     * @return string
-     */
-    public function atRuleName()
+    public function atRuleName(): string
     {
         return 'import';
     }

src/Rule/Rule.php

@@ -269,10 +269,7 @@ public function __toString()
         return $this->render(new OutputFormat());
     }
 
-    /**
-     * @return string
-     */
-    public function render(OutputFormat $oOutputFormat)
+    public function render(OutputFormat $oOutputFormat): string
     {
         $sResult = "{$oOutputFormat->comments($this)}{$this->sRule}:{$oOutputFormat->spaceAfterRuleName()}";
         if ($this->mValue instanceof Value) { // Can also be a ValueList