Copyediting chapter 12

Author: marijnh

12_language.md

@@ -259,7 +259,7 @@ specialForms.if = (args, scope) => {
 
 {{index "conditional execution", "ternary operator", "?: operator", "conditional operator"}}
 
-Egg's `if` construct expects exactly three arguments. It will evaluate the first, and if the result isn't the value `false`, it will evaluate the second. Otherwise, the third gets evaluated. This `if` form is more similar to JavaScript's ternary `?:` operator than to JavaScript's `if`. It is an expression, not a statement, and it produces a value, namely, the result of the second or third argument.
+Egg's `if` construct expects exactly three arguments. It will evaluate the first, and if the result isn't the value `false`, it will evaluate the second. Otherwise, the third gets evaluated. This `if` form is more similar to JavaScript's ternary `?:` operator than to JavaScript's `if`. It is an expression, not a statement, and it produces a value—namely, the result of the second or third argument.
 
 {{index Boolean}}
 
@@ -281,7 +281,7 @@ specialForms.while = (args, scope) => {
   }
 
   // Since undefined does not exist in Egg, we return false,
-  // for lack of a meaningful result.
+  // for lack of a meaningful result
   return false;
 };
 ```
@@ -383,7 +383,7 @@ do(define(total, 0),
 
 {{index "summing example", "Egg language"}}
 
-This is the program we've seen several times before that computes the sum of the numbers 1 to 10, expressed in Egg. It is clearly uglier than the equivalent JavaScript program—but not bad for a language implemented in less than 150 ((lines of code)).
+This is the program we've seen several times before that computes the sum of the numbers 1 to 10, expressed in Egg. It is clearly uglier than the equivalent JavaScript program—but not bad for a language implemented in fewer than 150 ((lines of code)).
 
 {{id egg_fun}}