If a link has spaces in it, wrap it in angle brackets

Fixes https://github.com/kaushalmodi/ox-hugo/issues/376

ox-hugo.el

@@ -2320,7 +2320,15 @@ and rewrite link paths to make blogging more seamless."
                   (org-link-unescape desc)))
          ;; Only link description, but no link attributes.
          (desc
-          (format "[%s](%s)" desc path))
+          (let* ((path-has-space (and
+                                  (not (string-prefix-p "{{< relref " path))
+                                  (string-match-p "\\s-" path)))
+                 (path (if path-has-space
+                           ;; https://github.com/kaushalmodi/ox-hugo/issues/376
+                           ;; https://github.com/gohugoio/hugo/issues/6742#issuecomment-573924706
+                           (format "<%s>" path)
+                         path)))
+            (format "[%s](%s)" desc path)))
          ;; Only link attributes, but no link description.
          (link-param-str
           (let ((path (org-html-encode-plain-text path)))

test/site/content-org/all-posts.org

@@ -162,6 +162,10 @@ even when inside page bundle pages.
  =org-hugo-default-static-subdirectory-for-externals=.
 ***** Same image, but hyperlinked to itself
 [[../files-to-be-copied-to-static/foo/copy-2-of-unicorn-logo.png][file:../files-to-be-copied-to-static/foo/copy-2-of-unicorn-logo.png]]
+*** Link to an image with space in filename
+This is a link to a file with a space in the filename:
+{{{oxhugoissue(376)}}}
+[[file:../files-to-be-copied-to-static/foo/unicorn logo.png][Link to ~unicorn logo.png~]]
 ** Inline hyperlinked and non-hyperlinked images                     :inline:
 :PROPERTIES:
 :EXPORT_FILE_NAME: inline-images

test/site/content/posts/image-links.md

@@ -142,3 +142,10 @@ Note
 #### Same image, but hyperlinked to itself {#same-image-but-hyperlinked-to-itself}
 
 {{< figure src="/ox-hugo/copy-2-of-unicorn-logo.png" link="/ox-hugo/copy-2-of-unicorn-logo.png" >}}
+
+
+## Link to an image with space in filename {#link-to-an-image-with-space-in-filename}
+
+This is a link to a file with a space in the filename:
+`ox-hugo` Issue #[376](https://github.com/kaushalmodi/ox-hugo/issues/376)
+[Link to `unicorn logo.png`](</ox-hugo/unicorn logo.png>)