exact + fuzzy matching

[moodymudskipper]

This happens often :

• https://stackoverflow.com/questions/48008903/combined-fuzzy-and-exact-matching/
• https://stackoverflow.com/questions/55261022/fuzzy-merge-on-multiple-variables-all-but-one-with-no-mispellings/
• https://stackoverflow.com/questions/44074732/fuzzy-merge-2-data-frames-on-time-in-r
• https://stackoverflow.com/questions/29449480/fuzzy-merging-in-r-seeking-help-to-improve-my-code
• https://stackoverflow.com/questions/55286637/fuzzymatch-left-join-for-one-column-but-require-exact-matches-for-the-rest-of-t
• https://stackoverflow.com/questions/47402576/merge-two-tables-exact-and-fuzzy
• https://stackoverflow.com/questions/48728437/inner-join-exactly-on-one-column-and-fuzzy-on-another

[moodymudskipper]

to be handled by https://github.com/moodymudskipper/safejoin/issues/33