Ignoring html5validator only appearing on Travis CI

.travis.yml

@@ -1,5 +1,9 @@
 language: python
 python: 3.6
+cache:
+  directories:
+    - "$HOME/.cache/pip"
+    - node_modules
 install:
   - ./run.sh install
   - ./run.sh install_dev

run.sh

@@ -33,7 +33,7 @@ test_ludochaordic () {
     # Too many missing img alt attributes in thoses:
     rm output/street-art-and-hedonogeolostism-in-london.html output/variante-2-joueurs-pour-bang-le-jeu-de-des.html
 
-    html5validator --root output/ --ignore-re='.*(Element "style" not allowed as child of element.*|Text not allowed in element "iframe" in this context.|Attribute "allow" not allowed on element "iframe" at this point.|No "p" element in scope but a "p" end tag seen.|End tag "p" implied, but there were open elements.|Unclosed element "a".|End tag "div" seen, but there were open elements.)' # issue with pelican renderer: <p> contains legally only inline-/inline-block-elements
+    html5validator --root output/ --ignore-re='.*(Element "eof" not allowed as child of element "p" in this context.|Element "style" not allowed as child of element.*|Text not allowed in element "iframe" in this context.|Attribute "allow" not allowed on element "iframe" at this point.|No "p" element in scope but a "p" end tag seen.|End tag "p" implied, but there were open elements.|Unclosed element "a".|End tag "div" seen, but there were open elements.)' # issue with pelican renderer: <p> contains legally only inline-/inline-block-elements
 
     cp ../pelican-mg/.htmlhintrc output/
     htmlhint output/