Added instruction on installing importmagic and epc.

Importmagic and epc isn't really optional if error messages are to be avoided.

CHANGELOG.develop

@@ -1900,6 +1900,7 @@ Other:
   rgb-24bit)
 - Added diminish for importmagic (thanks to Loys Ollivier)
 - Added debugger integration via =dap= layer
+- Added documentation on installing importmagic and epc (thanks to Trapez Breen)
 **** Racket
 - Restore smart closing paren behavior in racket-mode (thanks to Don March)
 **** Ranger

layers/+lang/python/README.org

@@ -22,6 +22,7 @@
 - [[#configuration][Configuration]]
   - [[#fill-column][Fill column]]
   - [[#sort-imports][Sort imports]]
+  - [[#importmagic][Importmagic]]
 - [[#management-of-python-versions-and-virtual-environments][Management of Python versions and virtual environments]]
   - [[#manage-virtual-environments-with-pyvenv][Manage virtual environments with pyvenv]]
   - [[#manage-multiple-python-versions-with-pyenv][Manage multiple Python versions with pyenv]]
@@ -222,6 +223,13 @@ config section:
 
 or as a directory-local variable (for per-project settings).
 
+** Importmagic
+   Install importmagic and epc for importmagic functionality.
+
+#+BEGIN_SRC sh
+  pip install importmagic epc
+#+END_SRC
+
 * Management of Python versions and virtual environments
 ** Manage virtual environments with pyvenv
 A virtual environment provides isolation of your Python package versions. For a