gnu: Don't append '.git' to GitHub uris.

* gnu/packages/admin.scm (nmrpflash)[source]: Remove '.git' from URI.
* gnu/packages/aidc.scm (zxing-cpp),
* gnu/packages/assembly.scm (mbuild),
* gnu/packages/audio.scm (opensles, wildmidi, tinyalsa),
* gnu/packages/browser-extensions.scm (ublock-origin-chromium),
* gnu/packages/check.scm (mutest),
* gnu/packages/compression.scm (unshield),
* gnu/packages/coq.scm (subset),
* gnu/packages/dictionaries.scm (translate-shell),
* gnu/packages/disk.scm (memkind),
* gnu/packages/documentation.scm (latex2html),
* gnu/packages/emacs-xyz.scm (emacs-chronometrist,
  emacs-flycheck-ledger, emacs-counsel-notmuch, emacs-spaceline,
  emacs-org-generate),
* gnu/packages/embedded.scm (ebusd, ebusd-configuration),
* gnu/packages/enchant.scm (nuspell),
* gnu/packages/fontutils.scm (woff2),
* gnu/packages/geo.scm (memphis),
* gnu/packages/gimp.scm (mrg),
* gnu/packages/gnome-xyz.scm (gnome-shell-extension-appindicator),
* gnu/packages/gnome.scm (parlatype),
* gnu/packages/golang.scm (go-github-com-tv42-httpunix,
  go-github-com-ayufan-golang-kardianos-service),
* gnu/packages/graphics.scm (eglexternalplatform, egl-wayland, mmm,
  directfb, flux),
* gnu/packages/gstreamer.scm (openni2, ccextractor, libvisual,
  graphene),
* gnu/packages/guile-xyz.scm (guile-srfi-180, guile-torrent),
* gnu/packages/image.scm (openjpeg-data),
* gnu/packages/java.scm (javacc),
* gnu/packages/language.scm (liblouis, liblouisutdml),
* gnu/packages/linux.scm (pamela, ttyebus),
* gnu/packages/lxqt.scm (lxqt-connman-applet),
* gnu/packages/mail.scm (libetpan),
* gnu/packages/man.scm (ronn),
* gnu/packages/music.scm (tascam-gtk, artyfx),
* gnu/packages/networking.scm (srt, lksctp-tools, nng, nanomsg),
* gnu/packages/python-crypto.scm (pure-python-otr),
* gnu/packages/qt.scm (qtspell),
* gnu/packages/raspberry-pi.scm (raspi-gpio, raspi-open-firmware),
* gnu/packages/rdp.scm (freerdp),
* gnu/packages/ruby.scm (ruby-prawn-templates, ruby-treetop, ruby-gimme,
  ruby-standard, ruby-rubocop-ast, ruby-rexml, ruby-range-compressor,
  ruby-regexp-property-values, ruby-regexp-parser, ruby-rubocop,
  ruby-pdf-reader, ruby-pdf-inspector, ruby-prawn),
* gnu/packages/syncthing.scm (syncthing-gtk),
* gnu/packages/video.scm (svt-hevc, mediasdk, libvideogfx, libde265,
  tslib),
* gnu/packages/xml.scm (libxmlb, libxmlplusplus)[source]: Same.

gnu/packages/emacs-xyz.scm

@@ -2238,7 +2238,7 @@ Lock key.")
      (origin
        (method git-fetch)
        (uri (git-reference
-             (url "https://github.com/contrapunctus-1/chronometrist.git")
+             (url "https://github.com/contrapunctus-1/chronometrist")
              (commit (string-append "v" version))))
        (file-name (git-file-name name version))
        (sha256
@@ -4564,7 +4564,7 @@ compile}.")
      (origin
        (method git-fetch)
        (uri (git-reference
-             (url "https://github.com/purcell/flycheck-ledger.git")
+             (url "https://github.com/purcell/flycheck-ledger")
              (commit version)))
        (file-name (git-file-name name version))
        (sha256
@@ -7662,7 +7662,7 @@ The purpose of this library is to wrap all the quirks and hassle of
        (origin
          (method git-fetch)
          (uri (git-reference
-               (url "https://github.com/fuxialexander/counsel-notmuch.git")
+               (url "https://github.com/fuxialexander/counsel-notmuch")
                (commit commit)))
          (file-name (git-file-name name version))
          (sha256
@@ -17339,7 +17339,7 @@ Dumb Jump performs best with The Silver Searcher @command{ag} or ripgrep
           (base32
            "1k8lljdbc90nd29xrhdrsscxavzdq532wq2mg7ljc94krj7538b1"))))
       (build-system emacs-build-system)
-      (home-page "https://github.com/bgamari/dts-mode.git")
+      (home-page "https://github.com/bgamari/dts-mode")
       (synopsis "Emacs minor mode for editing device tree files")
       (description
        "This package provides an Emacs minor mode for highlighting
@@ -19291,7 +19291,7 @@ scratch, and you think the Spacemacs theme looks good.
        (origin
          (method git-fetch)
          (uri (git-reference
-               (url "https://github.com/TheBB/spaceline.git")
+               (url "https://github.com/TheBB/spaceline")
                (commit commit)))
          (sha256
           (base32 "11lwckqcgzsahrkkm5wk1ph4kc7d4yz05r7251g8c9f0q6vdj9dp"))
@@ -19885,7 +19885,7 @@ programs can use this table component for the application UI.")
     (package
       (name "emacs-leetcode")
       (version (git-version "0" "1" commit))
-      (home-page "https://github.com/ginqi7/leetcode-emacs.git")
+      (home-page "https://github.com/ginqi7/leetcode-emacs")
       (source (origin
                 (method git-fetch)
                 (uri (git-reference
@@ -24915,7 +24915,7 @@ personal wiki.")
     (source (origin
               (method git-fetch)
               (uri (git-reference
-                    (url "https://github.com/conao3/org-generate.el.git")
+                    (url "https://github.com/conao3/org-generate.el")
                     (commit (string-append "v" version))))
               (file-name (git-file-name name version))
               (sha256