Fix header formatting

FormatAbstract.md

@@ -5,9 +5,9 @@ The `FormatAbstract` class implements the [`FormatInterface`](FormatInterface) i
 * [sanitizeHtml](#the-sanitizehtml-function)
 * [array_trim](#the-array_trim-function)
 
-#Functions
+# Functions
 
-##The `setContentType` function
+## The `setContentType` function
 
 The `setContentType` function receives a string defining the content type for the HTML header and must return the object instance.
 
@@ -15,7 +15,7 @@ The `setContentType` function receives a string defining the content type for th
 setContentType(string): self
 ```
 
-##The `callContentType` function
+## The `callContentType` function
 
 The `callContentType` function applies the content type to the header data and must return the object instance.
 
@@ -23,7 +23,7 @@ The `callContentType` function applies the content type to the header data and m
 callContentType(): self
 ```
 
-##The `sanitizeHtml` function
+## The `sanitizeHtml` function
 
 The `sanitizeHtml` function receives an HTML formatted string and returns the string with disabled `<script>`, `<iframe>` and `<link>` tags.
 
@@ -31,7 +31,7 @@ The `sanitizeHtml` function receives an HTML formatted string and returns the st
 sanitizeHtml(string $html): string
 ```
 
-##The `array_trim` function
+## The `array_trim` function
 
 The `array_trim` function receives an array of strings and returns the same array with all elements trimmed (like using the `trim` function on all elements)