command [git diff] exited with code 128. message: fatal: ambiguous argument 'get-diff-action/main...get-diff-action/pull/9/merge': unknown revision or path not in the working tree. Use '--' to separate paths from revisions, like this: 'git <command> [<revision>...] -- [<file>...]'

Unexpected input(s) 'SUFFIX_FILTER', valid inputs are ['GITHUB_TOKEN', 'DOT', 'BASE', 'RELATIVE', 'DIFF_FILTER', 'FORMAT', 'ESCAPE_JSON', 'SEPARATOR', 'PATTERNS', 'MINIMATCH_OPTION_NOBRACE', 'MINIMATCH_OPTION_NOGLOBSTAR', 'MINIMATCH_OPTION_DOT', 'MINIMATCH_OPTION_NOEXT', 'MINIMATCH_OPTION_NOCASE', 'MINIMATCH_OPTION_MATCH_BASE', 'MINIMATCH_OPTION_NONEGATE', 'FILES', 'SUMMARY_INCLUDE_FILES', 'ABSOLUTE', 'SET_ENV_NAME', 'SET_ENV_NAME_FILTERED_DIFF', 'SET_ENV_NAME_MATCHED_FILES', 'SET_ENV_NAME_COUNT', 'SET_ENV_NAME_INSERTIONS', 'SET_ENV_NAME_DELETIONS', 'SET_ENV_NAME_LINES', 'DIFF_DEFAULT', 'FILTERED_DIFF_DEFAULT', 'MATCHED_FILES_DEFAULT', 'COUNT_DEFAULT', 'GET_FILE_DIFF', 'INSERTIONS_DEFAULT', 'DELETIONS_DEFAULT', 'LINES_DEFAULT', 'CHECK_ONLY_COMMIT_WHEN_DRAFT', 'SUPPRESS_ERROR']

>> fatal: ambiguous argument 'get-diff-action/main...get-diff-action/pull/9/merge': unknown revision or path not in the working tree.

>> Use '--' to separate paths from revisions, like this: