bors 3ee9c2e1a0 Auto merge of #6037 - matthiaskrgr:single_char_insert, r=flip1995
single_char_insert_str: lint using insert_str() on single-char literals and suggest insert()

Fixes #6026

changelog: add single_char_insert_str lint which lints using string.insert_str() with single char literals and suggests string.insert() with a char
2020-11-03 15:36:33 +00:00
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