Long-time vim or neovim users are probably already aware that visually selecting a block of text then pressing CTRL + A in vim will result in any numbers in the selected block of text being incremented by 1. This works even if the block contains non-numeric text: each group of digits gets treated as a number and is incremented.¹

For example, here’s a video that shows what happens when you select some text in vim and then use CTRL + A to increment the values:

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1. To be pedantic, only the first group-of-digits/number on each line gets incremented; like many vim commands this only works on the first match per line of text unless some sort /g global modifier is used. ↩