Content #
Examples:
"abc" ==# "Abc" evaluates to 0
"abc" ==? "Abc" evaluates to 1
"abc" == "Abc" evaluates to 1 if 'ignorecase' is set, 0 otherwise
使用两个等号的比较，表达式的结果取决于用户的设置，很不确定。
From #
Links #
:help expr4
Explicit Case Sensitive or Insensitive Comparisons
April 11, 2023