Fix the exit code of the script

Scripts/developer_scripts/detect_files_with_mixed_eol_styles

@@ -1,3 +1,8 @@
-#/bin/bash
+#!/bin/bash
+
+if grep -lE '[^'`printf '\r'`']$' $(ack -l "`printf '\r'`\$" ${@:-.}); then
+   exit 1
+else
+   exit 0
+fi
 
-grep -lE '[^'`printf '\r'`']$' $(ack -l "`printf '\r'`\$" ${@:-.})