better comments

bin/compile

@@ -44,7 +44,7 @@ CACHE_DIR=$2
 # The detected application type (`Python`|`Python/Django`).
 NAME=$($BIN_DIR/detect $BUILD_DIR)
 
-# Where to store the Pip download cache.
+# Where to store the pip download cache.
 CACHED_DIRS=".heroku"
 PIP_DOWNLOAD_CACHE=${PIP_DOWNLOAD_CACHE:-$CACHE_DIR/pip_downloads}
 
@@ -53,7 +53,6 @@ VIRTUALENV_LOC=".heroku/venv"
 LEGACY_TRIGGER="lib/python2.7"
 PROFILE_PATH="$BUILD_DIR/.profile.d/python.sh"
 
-
 # Python version. This will be used in the future to specify custom Pythons.
 PYTHON_VERSION="2.7.2"
 PYTHON_EXE="python2.7"