Trying to fix a Jekyll build error

See
academicpages#1878 (comment)
and jekyll/jekyll#9544

_pages/404.md

@@ -1,7 +1,7 @@
 ---
 permalink: /404.html
 title: "Page Not Found"
-excerpt: "Page not found. Your pixels are in another canvas."
+#excerpt: "Page not found. Your pixels are in another canvas."
 sitemap: false
 ---
 

_pages/about.html

@@ -1,7 +1,7 @@
 ---
 permalink: /
 title: "About"
-excerpt: "I am Julius, a climate researcher and PhD candidate at the Potsdam Institute for Climate Impact Research, Germany.<br />My work focuses on the long-term stability of the Antarctic Ice Sheet as one of the main tipping elements in the Earth system."
+#excerpt: "I am Julius, a climate researcher and PhD candidate at the Potsdam Institute for Climate Impact Research, Germany.<br />My work focuses on the long-term stability of the Antarctic Ice Sheet as one of the main tipping elements in the Earth system."
 header:
   overlay_image: header/header_iceberg_TorstenAlbrecht.jpg
   overlay_filter: 0.2 # same as adding an opacity of 0.2 to a black background

_pages/contact.md

@@ -1,7 +1,7 @@
 ---
 permalink: /contact/
 title: "Contact"
-excerpt: "Contact details and online profiles."
+#excerpt: "Contact details and online profiles."
 header:
   overlay_image: header/header5.jpg
   overlay_filter: 0.2 # same as adding an opacity of 0.2 to a black background

_pages/cv.md

@@ -1,7 +1,7 @@
 ---
 permalink: /cv/
 title: "Curriculum Vitae"
-excerpt: "Education, scientific background, research interests & skills, and more."
+#excerpt: "Education, scientific background, research interests & skills, and more."
 author_profile: true
 redirect_from:
   - 

_pages/outreach.md

@@ -1,7 +1,7 @@
 ---
 permalink: /outreach/
 title: "Science Outreach"
-excerpt: "List of past and upcoming scientific talks, conference presentations, workshops, and taught courses."
+#excerpt: "List of past and upcoming scientific talks, conference presentations, workshops, and taught courses."
 header:
   overlay_image: header/header_reklim_KerstinRolfes.jpg
   overlay_filter: 0.2 # same as adding an opacity of 0.2 to a black background

_pages/publications.md

@@ -1,7 +1,7 @@
 ---
 permalink: /publications/
 title: "Publications"
-excerpt: "List of academic publications."
+#excerpt: "List of academic publications."
 header:
   overlay_image: header/header3.jpg
   overlay_filter: 0.2 # same as adding an opacity of 0.2 to a black background

_pages/research.md

@@ -1,7 +1,7 @@
 ---
 permalink: /research/
 title: "Research"
-excerpt: "More about my research, research interests and models I'm currently working with."
+#excerpt: "More about my research, research interests and models I'm currently working with."
 header:
   overlay_image: header/header1.jpg
   overlay_filter: 0.2 # same as adding an opacity of 0.2 to a black background

_pages/talkmap.html

@@ -1,7 +1,7 @@
 ---
 permalink: /outreach/talkmap/
 title: "Talk Map"
-excerpt: "Map of all the places I've given a talk."
+#excerpt: "Map of all the places I've given a talk."
 header:
   overlay_image: header/header4.jpg
   overlay_filter: 0.2 # same as adding an opacity of 0.2 to a black background