Moves lint logic into lint_clean_files.sh

.travis.yml

@@ -40,7 +40,7 @@ jobs:
       GO111MODULE=on go get mvdan.cc/sh/v3/cmd/shfmt;
       curl https://pre-commit.com/install-local.py | python3 -
     script:
-      pre-commit run --files `cat clean_files.txt`;
+      ./lint_clean_files.sh;
 
   - <<: *native_job
     name: Ubuntu 16.04

clean_files.txt

@@ -1 +1,2 @@
+lint_clean_files.sh
 themes/90210/90210.theme.bash

lint_clean_files.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+# Pull list of checkable files from clean_files.txt
+#
+mapfile -t FILES < clean_files.txt
+
+pre-commit run --files "${FILES[@]}"