save error to pattern files, remove unnecesary diff generation

hivemind/tavern/bridge_api_patterns/get_payout_stats_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (251 > 250)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/bridge_api_patterns/get_ranked_posts_invalid_sort.pat.json

+{
+  "code": -32602,
+  "data": "invalid sort",
+  "message": "Invalid parameters"
+}

hivemind/tavern/bridge_api_patterns/get_trending_topics_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (26 > 25)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_account_votes_deprecated.pat.json

+{
+  "code": -32000,
+  "data": "ApiError: get_account_votes is no longer supported, for details see https://steemit.com/steemit/@steemitdev/additional-public-api-change",
+  "message": "Server error"
+}

hivemind/tavern/condenser_api_patterns/get_blog_invalid_account_char.pat.json

+{
+  "code": -32602,
+  "data": "invalid account char",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_blog_invalid_limit.pat.json

+{
+  "code": -32602,
+  "data": "start_index and limit combination is invalid (11, 20)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_blog_non_existing.pat.json

+{
+  "code": -32602,
+  "data": "account not found: `non.existing`",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_blog_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (501 > 500)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_blog_too_long_account_name.pat.json

+{
+  "code": -32602,
+  "data": "invalid account name length: `too.long.account.name`",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_comment_discussions_by_payout_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (101 > 100)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_content_deleted.pat.json

+{
+  "code": -32000,
+  "data": "IndexError: list index out of range",
+  "message": "Server error"
+}

hivemind/tavern/condenser_api_patterns/get_discussions_by_author_before_date_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (101 > 100)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_discussions_by_comments_unexpected_keyword.pat.json

+{
+  "code": -32602,
+  "data": "get_discussions_by_comments() got an unexpected keyword argument 'author'",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_followers_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (1001 > 1000)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_followers_trending_tags_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (251 > 250)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_followers_wrong_type.pat.json

+{
+  "code": -32602,
+  "data": "invalid follow_type `wrong_type`",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_following_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (1001 > 1000)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_following_wrong_type.pat.json

+{
+  "code": -32602,
+  "data": "invalid follow_type `wrong_type`",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_post_discussions_by_payout_over_limit.pat.json

+{
+  "code": -32602,
+  "data": "limit exceeds max (101 > 100)",
+  "message": "Invalid parameters"
+}

hivemind/tavern/condenser_api_patterns/get_replies_by_last_update_blank_start_author.pat.json

+{
+  "code": -32602,
+  "data": "`start_author` cannot be blank",
+  "message": "Invalid parameters"
+}