fix: alignment

Co-authored-by: kang <1115610574@qq.com>

tools/vim.txt

@@ -17,7 +17,7 @@ a                   append after the cursor
 A                   append at the end of the line
 o                   open (append) blank line below current line
 O                   open blank line above current line
-<Esc>                 exit insert mode
+<Esc>               exit insert mode
 
 
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