Fix harmless typos in documentation

doc/2_Usage_of_basic_components.markdown

@@ -77,7 +77,7 @@ A parser instance can be reused to parse multiple files.
 Node dumping
 ------------
 
-To dump the abstact syntax tree in human readable form, a `NodeDumper` can be used:
+To dump the abstract syntax tree in human readable form, a `NodeDumper` can be used:
 
 ```php
 <?php

doc/component/Walking_the_AST.markdown

@@ -312,7 +312,7 @@ $extendingClasses = $nodeFinder->find($stmts, function(Node $node) {
         && $node->extends !== null;
 });
 
-// Find first class occuring in the AST. Returns null if no class exists.
+// Find first class occurring in the AST. Returns null if no class exists.
 $class = $nodeFinder->findFirstInstanceOf($stmts, Node\Stmt\Class_::class);
 
 // Find first class that has name $name

lib/PhpParser/Node/Stmt/TryCatch.php

@@ -18,7 +18,7 @@ class TryCatch extends Node\Stmt
      *
      * @param Node\Stmt[]   $stmts      Statements
      * @param Catch_[]      $catches    Catches
-     * @param null|Finally_ $finally    Optionaly finally node
+     * @param null|Finally_ $finally    Optional finally node
      * @param array         $attributes Additional attributes
      */
     public function __construct(array $stmts, array $catches, Finally_ $finally = null, array $attributes = []) {
@@ -31,7 +31,7 @@ class TryCatch extends Node\Stmt
     public function getSubNodeNames() : array {
         return ['stmts', 'catches', 'finally'];
     }
-    
+
     public function getType() : string {
         return 'Stmt_TryCatch';
     }