diff --git a/docs/Guardfile b/docs/Guardfile
index b689b079aea..6cbf07b0637 100755
--- a/docs/Guardfile
+++ b/docs/Guardfile
@@ -2,7 +2,7 @@
 from livereload.compiler import shell
 from livereload.task import Task
 
-Task.add('*.rst', shell('make html'))
-Task.add('*/*.rst', shell('make html'))
-Task.add('Makefile', shell('make html'))
-Task.add('conf.py', shell('make html'))
+Task.add("*.rst", shell("make html"))
+Task.add("*/*.rst", shell("make html"))
+Task.add("Makefile", shell("make html"))
+Task.add("conf.py", shell("make html"))