Fix code comments

src/MDMailFormat.php

@@ -1,11 +1,12 @@
 <?PHP
 /**
- * Wrapper class around mysqli.
+ * Formats a mail.
  */
 declare(strict_types = 1);
 
 /**
- * MD mysqli wrapper.
+ * MDMailFormat formats a mail by offering functions to simultaneously editing
+ * its HTML and Plain Text representations.
  */
 final class MDMailFormat {
 
@@ -49,7 +50,7 @@ public function appendHeadline(string $input):void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for adding a second level headline.
      *
      * @param string $input Input string.
      *
@@ -65,7 +66,7 @@ public function appendHeadlineSec(string $input):void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for adding a paragraph.
      *
      * @param string $input Input string.
      *
@@ -81,7 +82,7 @@ public function appendParagraph(string $input):void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for adding a button.
      *
      * @param string $href  Input link.
      * @param string $input Input text.
@@ -98,7 +99,7 @@ public function appendButton(string $href, string $input):void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for adding an inline link.
      *
      * @param string $href  Input link.
      * @param string $input Input text.
@@ -113,7 +114,7 @@ public function appendLink(string $href, string $input):void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for starting an unordered list.
      *
      * @return void
      */
@@ -124,7 +125,7 @@ public function startUl():void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for ending an unordered list.
      *
      * @return void
      */
@@ -135,7 +136,7 @@ public function endUl():void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for opening an ordered list.
      *
      * @return void
      */
@@ -146,7 +147,7 @@ public function startOl():void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for ending an ordered list.
      *
      * @return void
      */
@@ -157,7 +158,7 @@ public function endOl():void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for starting a list item in an unordered list.
      *
      * @return void
      */
@@ -168,7 +169,7 @@ public function startLiUl():void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for starting a list item in an ordered list.
      *
      * @param integer $counter Counter of the list item.
      *
@@ -181,7 +182,7 @@ public function startLiOl(int $counter):void {
     }
 
     /**
-     * Function for adding a headline.
+     * Function for ending a list item.
      *
      * @return void
      */