Updated installation instructions (#1807)

* Update installation section

* Indent

* Update admonition

* Update installation.rst

Co-authored-by: Jason Villanueva <[email protected]>

Author: Darylgolden

README.md

@@ -34,20 +34,15 @@ Manim is an animation engine for explanatory math videos. It's used to create pr
 -  [License](#license)
 
 ## Installation
-
+> **WARNING:** These instructions are for the community version _only_. Trying to use these instructions to install [3b1b/manim](https://github.com/3b1b/manim) or instructions there to install this version will cause problems. Read [this](https://docs.manim.community/en/stable/installation/versions.html) and decide which version you wish to install, then only follow the instructions for your desired version.
+        
 Manim requires a few dependencies that must be installed prior to using it. If you
 want to try it out first before installing it locally, you can do so
 [in our online Jupyter environment](https://mybinder.org/v2/gist/behackl/725d956ec80969226b7bf9b4aef40b78/HEAD?filepath=basic%20example%20scenes.ipynb).
 
-For the local installation, please visit the [Documentation](https://docs.manim.community/en/stable/installation.html)
+For local installation, please visit the [Documentation](https://docs.manim.community/en/stable/installation.html)
 and follow the appropriate instructions for your operating system.
-
-Once the dependencies have been installed, run the following in a terminal window:
-
-```bash
-pip install manim
-```
-
+       
 ## Usage
 
 Manim is an extremely versatile package. The following is an example `Scene` you can construct:

docs/source/installation.rst

@@ -6,13 +6,14 @@ The following pages have instructions that are specific to your system. Once
 you are done installing the dependencies, come back to this page to install
 manim itself.
 
-.. note::
 
-   Before installing manim, you should understand that there are a few main versions of manim 
-   today that are generally incompatible with each other.
-   This documentation **only** covers the installation of the *community edition*; 
-   trying to use instructions intended for other versions of manim or vice versa will likely result in failure.
-   In particular, most video tutorials are outdated. For more information, please read :doc:`Differences between Manim Versions <installation/versions>`.
+.. warning:: 
+   These instructions are for the *community edition* of Manim **only**. Trying
+   to use these instructions to install
+   `3b1b/manim <https://github.com/3b1b/manim>`_ or instructions there to install
+   this version will cause problems. Read the :doc:`Differences between Manim
+   Versions <installation/versions>` and decide which version you wish to
+   install, then only follow the instructions for your desired version.
 
 
 .. tip::