docs(cb-dynamic-form): Fix a few minor grammar errors in dynamic form cookbook

closes #981

Author: thelgevold

public/docs/ts/latest/cookbook/dynamic-form.jade

@@ -7,12 +7,12 @@ include ../_util-fns
 
    It may be more economical to create the forms dynamically, based on metadata that describe the business object model.
 
-   In this cookbook we show how to use `ngFormModel` to dynamically to render a simple form with different control types and validation.
+   In this cookbook we show how to use `ngFormModel` to dynamically render a simple form with different control types and validation.
    It's a primitive start. 
    It might evolve to support a much richer variety of questions, more graceful rendering, and superior user experience.
    All such greatness has humble beginnings.
 
-   Our example we use a dynamic form to build an online application experience for heroes seeking employment.
+   In our example we use a dynamic form to build an online application experience for heroes seeking employment.
    The agency is constantly tinkering with the application process.
    We can create the forms on the fly *without changing our application code*. 
 
@@ -119,7 +119,7 @@ include ../_util-fns
 <a id="dynamic-template"></a>
 :marked
    ## Dynamic Template
-   Although in this example we're model a job application for heroes, there are no references to any specific hero question 
+   Although in this example we're modelling a job application for heroes, there are no references to any specific hero question 
    outside the objects returned by `QuestionService`. 
 
    This is very important since it allows us to repurpose the components for any type of survey