From b032a7cd278c96b7aa29c001cb2e3a9c47cdbbb2 Mon Sep 17 00:00:00 2001
From: nuest <daniel.nuest@uni-muenster.de>
Date: Mon, 5 Nov 2018 18:51:10 +0100
Subject: [PATCH] safe one if clause (intersection is already false-y)

---
 repo2docker/buildpacks/base.py | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/repo2docker/buildpacks/base.py b/repo2docker/buildpacks/base.py
index 6c31e9d6..8e1c04f9 100644
--- a/repo2docker/buildpacks/base.py
+++ b/repo2docker/buildpacks/base.py
@@ -554,19 +554,18 @@ class BaseImage(BuildPack):
             ))
         except FileNotFoundError:
             pass
-        if self.stencila_contexts:
-            if {'py', 'pyjp'}.intersection(self.stencila_contexts):
-                assemble_scripts.extend(
-                    [
-                        (
-                            "${NB_USER}",
-                            r"""
-                            ${KERNEL_PYTHON_PREFIX}/bin/pip install --no-cache https://github.com/stencila/py/archive/f1260796.tar.gz && \
-                            ${KERNEL_PYTHON_PREFIX}/bin/python -m stencila register
-                            """,
-                        )
-                    ]
-                )
+        if {'py', 'pyjp'}.intersection(self.stencila_contexts):
+            assemble_scripts.extend(
+                [
+                    (
+                        "${NB_USER}",
+                        r"""
+                        ${KERNEL_PYTHON_PREFIX}/bin/pip install --no-cache https://github.com/stencila/py/archive/f1260796.tar.gz && \
+                        ${KERNEL_PYTHON_PREFIX}/bin/python -m stencila register
+                        """,
+                    )
+                ]
+            )
         if self.stencila_manifest_dir:
             assemble_scripts.extend(
                 [