Issue:
I have faced this issue while installing the Magento security patch installation SUPEE-10975.
Error:
checking file app/code/core/Enterprise/GiftRegistry/Model/Attribute/Processor.php
Hunk #1 FAILED at 48 (different line endings).
Root cause:
While uploading the file window to linux PHP files have dos line-endings.
Solution:
We need to convert the files to unix format for all our Magento files.
Run the below line in the magento root directory.
Example:
cd /var/www/html
find . -type f -exec dos2unix {} \;
