[bug#40593] Added emacs-uml-mode

[Alberto EFG]

Added emacs-uml-mode. I used the same branch where I wrote
emacs-org-roam (bug#40591) hope it is ok.

guix size is 0.1 MB

The package is just an emacs file, there should not be much problem.

>From 0289b51837ea2edfe610deb2e91ee329601f1234 Mon Sep 17 00:00:00 2001
From: Alberto Eleuterio Flores Guerrero <address@hidden>
Date: Mon, 13 Apr 2020 01:07:04 -0500
Subject: [PATCH] gnu: Add emacs-uml-mode.

* gnu/packages/emacs-xyz.scm (emacs-uml-mode): New variable.
---
 gnu/packages/emacs-xyz.scm | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/gnu/packages/emacs-xyz.scm b/gnu/packages/emacs-xyz.scm
index 0f1c48be2e..0fdc509038 100644
--- a/gnu/packages/emacs-xyz.scm
+++ b/gnu/packages/emacs-xyz.scm
@@ -22332,3 +22332,25 @@ without hierarchy and are connected by tags.  Notes 
can be found
 and created quickly.  Org-roam should also work as a plug-and-play
  solution for anyone already using Org-mode for their personal wiki.")
    (license license:gpl3)))
+
+(define-public emacs-uml-mode
+  (package
+   (name "emacs-uml-mode")
+   (version "0.0.4")
+   (source
+    (origin
+     (method git-fetch)
+     (uri (git-reference
+           (url "https://github.com/ianxm/emacs-uml.git";)
+           (commit "4c37ac1c4424b2313cd8f16ba48a98a4cc214200")))
+     (file-name (git-file-name name version))
+     (sha256
+      (base32
+       "145i4srnfvd1vyibri2a1l6p9mbjvkkwlrpi41134pbarqffcnka"))))
+   (build-system emacs-build-system)
+   (home-page "https://github.com/ianxm/emacs-uml";)
+   (synopsis "Minor mode for editing ascii UML sequence diagrams")
+   (description "@code{emacs-uml-mode} is a minor mode that
+ makes it easy to build ascii UML sequence diagrams in Emacs,
+which can be embedded in source code, comments or emails.")
+   (license license:gpl3)))
-- 
2.26.0