diff --git a/var/spack/repos/builtin/packages/libxau/package.py b/var/spack/repos/builtin/packages/libxau/package.py
index 5f8836cd8ea3d..7d8a4292809d2 100644
--- a/var/spack/repos/builtin/packages/libxau/package.py
+++ b/var/spack/repos/builtin/packages/libxau/package.py
@@ -24,9 +24,10 @@
 ##############################################################################
 from spack import *
 
+
 class Libxau(Package):
-    """The libXau package contains a library implementing the X11 
-    Authorization Protocol. This is useful for restricting client 
+    """The libXau package contains a library implementing the X11
+    Authorization Protocol. This is useful for restricting client
     access to the display."""
 
     homepage = "http://www.linuxfromscratch.org/blfs/view/7.9/index.html"
diff --git a/var/spack/repos/builtin/packages/libxcb/package.py b/var/spack/repos/builtin/packages/libxcb/package.py
index e7462d0d333ad..804c287feda32 100644
--- a/var/spack/repos/builtin/packages/libxcb/package.py
+++ b/var/spack/repos/builtin/packages/libxcb/package.py
@@ -24,6 +24,7 @@
 ##############################################################################
 from spack import *
 
+
 class Libxcb(Package):
     """The X protocol C-language Binding (XCB) is a replacement
     for Xlib featuring a small footprint, latency hiding, direct
@@ -39,13 +40,14 @@ class Libxcb(Package):
     depends_on("xcb-proto")
     depends_on("pkg-config")
 
-    # depends_on('pthread')    # Ubuntu: apt-get install libpthread-stubs0-dev
-    depends_on('libxau')        # Ubuntu: apt-get install libxau-dev
+    # depends_on('pthread')  # Ubuntu: apt-get install libpthread-stubs0-dev
+    depends_on('libxau')
 
     def patch(self):
-        filter_file('NEEDED="pthread-stubs xau >= 0.99.2"', 'NEEDED="xau >= 0.99.2"', 'configure')
-        filter_file('typedef struct xcb_auth_info_t {', 'typedef struct {', 'src/xcb.h')
-
+        filter_file('NEEDED="pthread-stubs xau >= 0.99.2"',
+                    'NEEDED="xau >= 0.99.2"', 'configure')
+        filter_file('typedef struct xcb_auth_info_t {',
+                    'typedef struct {', 'src/xcb.h')
 
     def install(self, spec, prefix):
         configure("--prefix=%s" % prefix)
diff --git a/var/spack/repos/builtin/packages/xproto/package.py b/var/spack/repos/builtin/packages/xproto/package.py
index 5ffd7f99916cf..e4df0f32e6aed 100644
--- a/var/spack/repos/builtin/packages/xproto/package.py
+++ b/var/spack/repos/builtin/packages/xproto/package.py
@@ -24,8 +24,9 @@
 ##############################################################################
 from spack import *
 
+
 class Xproto(Package):
-    """The Xorg protocol headers provide the header files required to 
+    """The Xorg protocol headers provide the header files required to
     build the system, and to allow other applications to build against
     the installed X Window system."""