Fix typo in doc/makefile

doc/Makefile

@@ -7,7 +7,7 @@ include config.mk
 
 MAN_SOURCES=$(wildcard man/*.rst) $(wildcard man/*.txt) man/conf.py
 DOXYGEN_SOURCES=$(wildcard ../*.h) Doxyfile
-HTML_SORUCES=$(wildcard *.rst api/*.rst configuration/*.rst installation/*.rst usage/*.rst) conf.py
+HTML_SOURCES=$(wildcard *.rst api/*.rst configuration/*.rst installation/*.rst usage/*.rst) conf.py
 
 SPHINX_OPTS+=-d $(SPHINX_BUILDDIR)/doctrees
 

doc/usage/index.rst

-.. zathura documentation master file, created by
-   sphinx-quickstart on Tue Apr  8 18:33:05 2014.
-   You can adapt this file completely to your liking, but it should at least
-   contain the root `toctree` directive.
-
-Welcome to zathura's documentation!
-===================================
+Usage
+======
 
 .. toctree::
    :maxdepth: 2
    :numbered:
 
-   installation/index
-   usage/index
-   configuration/index
-   api/index
-   faq
-
-.. toctree::
-   :hidden:
-
-  man/zathura.1
-  man/zathurarc.5
+    commands