Revert "Template Expression Operators Copy Edit "

This reverts commit d0811714d5.

public/docs/ts/latest/guide/template-syntax.jade

@@ -1401,11 +1401,11 @@ h3#aliasing-io Aliasing input/output properties
 :marked
   <a id="pipe"></a>
   ### The pipe operator ( | )
-  Pipes are simple functions that accept an input value and return a transformed value.
   The result of an expression might require some transformation before we’re ready to use it in a binding.  For example, we might want to display a number as a currency, force text to uppercase, or filter a list and sort it.
 
-  Angular [pipes](./pipes.html) are a good choice for small transformations such as those listed above.
+  Angular [pipes](./pipes.html) are a good choice for small transformations such as these.
-  Pipe operators are easy to apply within template expressions, using the **pipe operator (`|`)**:
+  Pipes are simple functions that accept an input value and return a transformed value.
+  They're easy to apply within template expressions, using the **pipe operator (`|`)**:
 +makeExample('template-syntax/ts/app/app.component.html', 'pipes-1')(format=".")
 :marked
   The pipe operator passes the result of an expression on the left to a pipe function on the right.
@@ -1413,7 +1413,7 @@ h3#aliasing-io Aliasing input/output properties
   We can chain expressions through multiple pipes:
 +makeExample('template-syntax/ts/app/app.component.html', 'pipes-2')(format=".")
 :marked
-  We can also [apply parameters](./pipes.html#parameterizing-a-pipe) to a pipe:
+  And we can also [apply parameters](./pipes.html#parameterizing-a-pipe) to a pipe:
 +makeExample('template-syntax/ts/app/app.component.html', 'pipes-3')(format=".")
 
 block json-pipe
@@ -1421,7 +1421,7 @@ block json-pipe
     The `json` pipe is particularly helpful for debugging our bindings:
   +makeExample('template-syntax/ts/app/app.component.html', 'pipes-json')(format=".")
   :marked
-    The generated output would look something like this:
+    The generated output would look something like this
   code-example(language="json").
     { "firstName": "Hercules", "lastName": "Son of Zeus",
       "birthdate": "1970-02-25T08:00:00.000Z",
@@ -1433,7 +1433,7 @@ block json-pipe
   ### The safe navigation operator ( ?. ) and null property paths
 
   The Angular **safe navigation operator (`?.`)** is a fluent and convenient way to guard against null and undefined values in property paths.
-  Here it is used to protect against against a view render failure if the `currentHero` is null:
+  Here it is, protecting against a view render failure if the `currentHero` is null.
 +makeExample('template-syntax/ts/app/app.component.html', 'safe-2')(format=".")
 
 block dart-safe-nav-op
@@ -1446,10 +1446,10 @@ block dart-safe-nav-op
 +makeExample('template-syntax/ts/app/app.component.html', 'safe-1')(format=".")
 :marked
   The view still renders but the displayed value is blank; we see only "The title is" with nothing after it.
-  That is reasonable a behavior. At least the app doesn't crash.
+  That is reasonable behavior. At least the app doesn't crash.
 
-  Suppose the template expression involves a property path, as seen in this next example
+  Suppose the template expression involves a property path, as in this next example
-  where we’re displaying the `firstName` of a null hero:
+  where we’re displaying the `firstName` of a null hero.
 
 code-example(language="html").
   The null hero's name is {{nullHero.firstName}}