fix typo, split sentence

docs/usage.rst

@@ -62,8 +62,8 @@ Some "yes" sayers (if set, they automatically confirm that you really want to do
         For "Warning: 'check --repair' is an experimental feature that might result in data loss."
     BORG_CYTHON_DISABLE
         Disables the loading of Cython modules. This is currently
-        experimentaly and is used only to generate usage docs at build
-        time, it's unlikely to produce good results on a regular
+        experimental and is used only to generate usage docs at build
+        time. It is unlikely to produce good results on a regular
         run. The variable should be set to the calling class, and
         should be unique. It is currently only used by ``build_usage``.
 

setup.py

@@ -203,7 +203,7 @@ build.sub_commands.append(('build_usage', None))
 
 
 class build_py_custom(build_py):
-    """override build_py to also build our stuf
+    """override build_py to also build our stuff
 
     it is unclear why this is necessary, but in some environments
     (Readthedocs.org, specifically), the above