Minor typo fixes

Author: david-davidson

the-super-tiny-compiler.js

@@ -107,8 +107,8 @@
  * 1. *Parsing* is taking raw code and turning it into a more abstract
  *    representation of the code.
  *
- * 2. *Transformation* takes this abstract representation and manipulates to do
- *    whatever the compiler wants it to.
+ * 2. *Transformation* takes this abstract representation and manipulates it to
+ *    do whatever the compiler wants it to.
  *
  * 3. *Code Generation* takes the transformed representation of the code and
  *    turns it into new code.
@@ -333,7 +333,7 @@
  *
  * Code generators work several different ways, some compilers will reuse the
  * tokens from earlier, others will have created a separate representation of
- * the code so that they can print node linearly, but from what I can tell most
+ * the code so that they can print nodes linearly, but from what I can tell most
  * will use the same AST we just created, which is what we’re going to focus on.
  *
  * Effectively our code generator will know how to “print” all of the different
@@ -629,7 +629,7 @@ function parser(tokens) {
       //   (add 2 (subtract 4 2))
       //
       // You'll also notice that in our tokens array we have multiple closing
-      // parenthesis.
+      // parentheses.
       //
       //   [
       //     { type: 'paren',  value: '('        },
@@ -850,8 +850,8 @@ function transformer(ast) {
   };
 
   // Next I'm going to cheat a little and create a bit of a hack. We're going to
-  // use a property named `context` on our parent nodes that we're going to push
-  // nodes to their parent's `context`. Normally you would have a better
+  // use a property named `context` on our parent nodes that we're going to use
+  // to push nodes to their parent's `context`. Normally you would have a better
   // abstraction than this, but for our purposes this keeps things simple.
   //
   // Just take note that the context is a reference *from* the old ast *to* the