patch 8.0.0180: error E937 is used twice commit https://github.com/vim/vim/commit/83381f7129aca00bc2dd24527f160bc6a60d70af Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 14 14:36:08 2017 +0100 patch 8.0.0180: error E937 is used twice Problem: Error E937 is used both for duplicate key in JSON and for trying to delete a buffer that is in use. Solution: Rename the JSON error to E938. (Norio Takagi, closes #1376)

is<F4>foo
{'silent': 0, 'noremap': 0, 'lhs': 'foo<C-V>', 'mode': ' ', 'nowait': 0, 'expr': 0, 'sid': 0, 'rhs': 'is<F4>foo', 'buffer': 0}
{'silent': 1, 'noremap': 1, 'lhs': 'bar', 'mode': 'v', 'nowait': 0, 'expr': 1, 'sid': 0, 'rhs': 'isbar', 'buffer': 1}
{'silent': 0, 'noremap': 0, 'lhs': 'foo', 'mode': ' ', 'nowait': 1, 'expr': 0, 'sid': 0, 'rhs': 'bar', 'buffer': 1}
xrx
yRy
abcd