feat: Document changes for sentry.python 0.7.7 (#850)

* feat: Document changes for sentry.python 0.7.7

* fix: Styleguide

Author: untitaker

__tests__/__snapshots__/documentation.js.snap

@@ -371,6 +371,7 @@ Array [
   "platforms/python/default-integrations/index.html",
   "platforms/python/django/index.html",
   "platforms/python/flask/index.html",
+  "platforms/python/gnu_backtrace/index.html",
   "platforms/python/index.html",
   "platforms/python/logging/index.html",
   "platforms/python/pyramid/index.html",

src/collections/_documentation/platforms/python/aiohttp.md

@@ -10,15 +10,21 @@ sidebar_order: 4
 
 The AIOHTTP integration adds support for the [AIOHTTP-Server Web
 Framework](https://docs.aiohttp.org/en/stable/web.html). A Python version of
-3.7 or greater is required.
+3.6 or greater is required.
 
 1. Install `sentry-sdk` from PyPI:
 
     ```bash
     $ pip install --upgrade 'sentry-sdk=={% sdk_version sentry.python %}'
     ```
 
-2.  Initialize the SDK before starting the server:
+2.  If you're on Python 3.6, you also need the `aiocontextvars` package:
+
+    ```bash
+    $ pip install --upgrade aiocontextvars
+    ```
+
+3.  Initialize the SDK before starting the server:
 
     ```python
     import sentry_sdk

src/collections/_documentation/platforms/python/gnu_backtrace.md

@@ -0,0 +1,23 @@
+---
+title: GNU Backtrace
+sidebar_order: 2
+---
+<!-- WIZARD -->
+*Import name: `sentry_sdk.integrations.gnu_backtrace.GnuBacktraceIntegration`*
+
+The GNU backtrace integration parses native stack trace produced by [`backtrace_symbols`](https://linux.die.net/man/3/backtrace_symbols) from error messages and concatenates them with the Python traceback.
+
+It is currently tested to work with server exceptions raised by [`clickhouse-driver`](https://github.com/mymarilyn/clickhouse-driver).
+
+**This integration is experimental.** It may be removed in minor versions. When enabling this integration, expect to see new event groups due to new stack trace frames.
+
+Add ``GnuBacktraceIntegration()`` to your ``integrations`` list:
+
+```python
+import sentry_sdk
+from sentry_sdk.integrations.celery import CeleryIntegration
+
+sentry_sdk.init("___PUBLIC_DSN___", integrations=[GnuBacktraceIntegration()])
+```
+
+<!-- ENDWIZARD -->

src/collections/_documentation/platforms/python/index.md

@@ -40,6 +40,7 @@ SDK. A call to `sentry_sdk.init` configures integrations. Unless you set `defaul
 ### Other Integrations
 
 * [Logging]({% link _documentation/platforms/python/logging.md %})
+* [GNU Backtrace]({% link _documentation/platforms/python/gnu_backtrace.md %})
 * [Default integrations]({% link _documentation/platforms/python/default-integrations.md %})
 
 {% capture __alert_content -%}

src/collections/_documentation/platforms/python/sanic.md

@@ -9,15 +9,22 @@ sidebar_order: 3
 *Import name: `sentry_sdk.integrations.sanic.SanicIntegration`*
 
 The Sanic integration adds support for the [Sanic Web
-Framework](https://github.com/huge-success/sanic).
+Framework](https://github.com/huge-success/sanic). A Python version of 3.6 or
+greater is required.
 
 1. Install `sentry-sdk` from PyPI:
 
     ```bash
     $ pip install --upgrade 'sentry-sdk=={% sdk_version sentry.python %}'
     ```
 
-2.  To configure the SDK, initialize it with the integration before or after your app has been initialized:
+2.  If you're on Python 3.6, you also need the `aiocontextvars` package:
+
+    ```bash
+    $ pip install --upgrade aiocontextvars
+    ```
+
+3.  To configure the SDK, initialize it with the integration before or after your app has been initialized:
 
     ```python
     import sentry_sdk

src/collections/_documentation/platforms/python/tornado.md

@@ -10,15 +10,21 @@ sidebar_order: 4
 
 The Tornado integration adds support for the [Tornado Web
 Framework](https://www.tornadoweb.org/). A Tornado version of 5 or greater and
-Python 3.7 or greater is required.
+Python 3.6 or greater is required.
 
 1. Install `sentry-sdk` from PyPI:
 
     ```bash
     $ pip install --upgrade sentry-sdk=={% sdk_version sentry.python %}
     ```
 
-2.  Initialize the SDK before starting the server:
+2.  If you're on Python 3.6, you also need the `aiocontextvars` package:
+
+    ```bash
+    $ pip install --upgrade aiocontextvars
+    ```
+
+3.  Initialize the SDK before starting the server:
 
     ```python
     import sentry_sdk
@@ -45,9 +51,6 @@ Python 3.7 or greater is required.
 
 * {% include platforms/python/request-data.md %}
 
-  *Note: The tornado integration currently does not capture formdata.* See [the
-  relevant GitHub issue](https://github.com/getsentry/sentry-python/issues/221)
-
 * Logging with any logger will create breadcrumbs when
   the [Logging]({% link _documentation/platforms/python/logging.md %})
   integration is enabled (done by default).