gnu: emacs-polymode: Update to 0.1.5.

* gnu/packages/emacs.scm (emacs-polymode): Update to 0.1.5.

gnu/packages/emacs.scm

@@ -7924,21 +7924,18 @@ contexts.
     (license license:gpl3+)))
 
 (define-public emacs-polymode
-  ;; There hasn't been a proper release.
-  (let ((commit "0340f5e7e55235832e59673f027cc79a23cbdcd6")
-        (revision "1"))
   (package
     (name "emacs-polymode")
-      (version (string-append "1.0-" revision "." (string-take commit 7)))
+    (version "0.1.5")
     (source (origin
               (method git-fetch)
               (uri (git-reference
                     (url "https://github.com/vspinu/polymode.git")
-                      (commit commit)))
+                    (commit (string-append "v" version))))
-                (file-name (string-append name "-" version "-checkout"))
+              (file-name (git-file-name name version))
               (sha256
                (base32
-                  "057cybkq3cy07n5s332k071sjiky3mziy003lza4rh75mgqkwhmh"))))
+                "0wwphs54jx48a3ca6x1qaz56j3j9bg4mv8g2akkffrzbdcb8sbc7"))))
     (build-system emacs-build-system)
     (arguments
      `(#:include (cons* "^modes/.*\\.el$" %default-include)
@@ -7956,7 +7953,7 @@ for multiple major modes inside a single Emacs buffer.  It is lightweight,
 object oriented and highly extensible.  Creating a new polymode typically
 takes only a few lines of code.  Polymode also provides extensible facilities
 for external literate programming tools for exporting, weaving and tangling.")
-      (license license:gpl3+))))
+    (license license:gpl3+)))
 
 (define-public eless
   (package