"case-sensitive" and "case-insensitive" are easy to mix up #265
Description
Hi,
I am following the specification to implement a PHP lexer.
I noticed that there is a mix of the wording "not case-sensitive" and "case-insensitive".
Would it make sense to just use "not case-sensitive" so that it is more clear?
In my opinion "case-sensitive" and "case-insensitive" is easier to accidentally mix it up.
Examples:
php-langspec/spec/09-lexical-structure.md
Line 417 in ca697b4
php-langspec/spec/06-constants.md
Line 37 in ca697b4