Apply suggestions from code review

Co-authored-by: Antoine Makdessi <[email protected]>

Author: greg0ire

contributing/code/stack_trace.rst

@@ -21,7 +21,7 @@ unexpected places, such as lines of code where exceptions are thrown.
 Stack Traces and Exceptions
 ---------------------------
 
-In PHP, every exception comes with it own stack trace, which is
+In PHP, every exception comes with its own stack trace, which is
 displayed by default if the exception is not caught. When using Symfony,
 such exceptions go through a custom exception handler, which enhances
 them in various ways before displaying them according to the current
@@ -34,7 +34,7 @@ Nested Exceptions
 -----------------
 
 When programs get bigger, complexity is often tackled with layers of
-architecture that need to be kept separate. For instance, if you have an
+architecture that need to be kept separate. For instance, if you have a
 web application that makes a call to a remote API, it might be good to
 wrap exceptions thrown when making that call with exceptions that have
 special meaning in your domain, and to build appropriate HTTP exceptions
@@ -57,7 +57,7 @@ code and then your code might call it. This means you will always have
 at least 2 parts, very often 3 in your stack traces when using Symfony:
 a part that starts in one of the entrypoints of the framework
 (``bin/console`` or ``public/index.php`` in most cases), and ends when
-reaching your code, most times in a command or in an action found under
+reaching your code, most times in a command or in a controller found under
 ``src``. Then, either the exception is thrown in your code or in
 libraries you call. If it is the latter, there should be a third part in
 the stack trace with calls made in files under ``vendor``. Before
@@ -80,7 +80,7 @@ symfony/symfony`` when reporting a bug for any component.
 Getting Stack Traces with Symfony
 ---------------------------------
 
-Now that we have all this in mind, let us see how to get a Stack trace
+Now that we have all this in mind, let us see how to get a stack trace
 with Symfony.
 
 Stack Traces in your Web Browser