README: fix code blocks

README.md

@@ -43,11 +43,11 @@ rerun
 `patches`; the resulting branch will be called `patched`, while the commit specified in `modules`
 can be refered to by the branch `base`.
 
-    make unpatch
+	make unpatch
 
 sets the repositories to the `base` branch,
 
-     make patch
+	make patch
 
 re-applies the patches by resetting the `patched` branch to `base` and calling `git am`
 for the patch files. Calling `make` or a similar command after calling `make unpatch`
@@ -56,6 +56,7 @@ is generally not a good idea.
 After new patches have been commited on top of the patched branch (or existing commits
 since the base commit have been edited or removed), the patch directories can be regenerated
 using
+
 	make update-patches
 
 If applying a patch fails because you have changed the base commit, the repository will be reset to the old `patched` branch