Add type annotations for Renderable

Also add type annotations to the implementing classes, and also drop
type annotations that duplicat the paramter type declarations.

Author: oliverklee

src/CSSList/Document.php

@@ -127,7 +127,7 @@ public function createShorthands()
     }
 
     /**
-     * Override render() to make format argument optional
+     * Override `render()` to make format argument optional
      *
      * @param OutputFormat|null $oOutputFormat
      *

src/CSSList/KeyFrame.php

@@ -68,8 +68,6 @@ public function __toString()
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)

src/Property/CSSNamespace.php

@@ -33,14 +33,15 @@ public function getLineNo()
         return $this->iLineNo;
     }
 
+    /**
+     * @return string
+     */
     public function __toString()
     {
         return $this->render(new OutputFormat());
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)

src/Property/Charset.php

@@ -76,8 +76,6 @@ public function __toString()
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)

src/Property/Import.php

@@ -61,14 +61,15 @@ public function getLocation()
         return $this->oLocation;
     }
 
+    /**
+     * @return string
+     */
     public function __toString()
     {
         return $this->render(new OutputFormat());
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)

src/Renderable.php

@@ -10,11 +10,12 @@ interface Renderable
     public function __toString();
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat);
 
+    /**
+     * @return int
+     */
     public function getLineNo();
 }

src/RuleSet/AtRuleSet.php

@@ -48,14 +48,15 @@ public function atRuleArgs()
         return $this->sArgs;
     }
 
+    /**
+     * @return string
+     */
     public function __toString()
     {
         return $this->render(new OutputFormat());
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)

src/RuleSet/RuleSet.php

@@ -224,14 +224,15 @@ public function removeRule($mRule)
         }
     }
 
+    /**
+     * @return string
+     */
     public function __toString()
     {
         return $this->render(new OutputFormat());
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)

src/Value/CSSFunction.php

@@ -37,14 +37,15 @@ public function getArguments()
         return $this->aComponents;
     }
 
+    /**
+     * @return string
+     */
     public function __toString()
     {
         return $this->render(new OutputFormat());
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)

src/Value/CSSString.php

@@ -61,14 +61,15 @@ public function getString()
         return $this->sString;
     }
 
+    /**
+     * @return string
+     */
     public function __toString()
     {
         return $this->render(new OutputFormat());
     }
 
     /**
-     * @param OutputFormat $oOutputFormat
-     *
      * @return string
      */
     public function render(OutputFormat $oOutputFormat)