Update lint.md (#634)

Add documentation for IntegerParsing and ComparisonPrecedence lints

docs/_pages/lint.md

@@ -327,3 +327,26 @@ Luau uses comments that start from `!` to control certain aspects of analysis, f
 -- Unknown comment directive 'nostrict'; did you mean 'nonstrict'?"
 ```
 ```
+
+## IntegerParsing (27)
+
+Luau parses hexadecimal and binary literals as 64-bit integers before converting them to Luau numbers. As a result, numbers that exceed 2^64 are silently truncated to 2^64, which can result in unexpected program behavior. This warning flags literals that are truncated:
+
+```
+-- Hexadecimal number literal exceeded available precision and has been truncated to 2^64
+local x = 0x1111111111111111111111111111111111111
+```
+
+## ComparisonPrecedence (28)
+
+Because of operator precedence rules, not X == Y parses as (not X) == Y; however, often the intent was to invert the result of the comparison. This warning flags erroneous conditions like that, as well as flagging cases where two comparisons happen in a row without any parentheses:
+
+```
+-- not X == Y is equivalent to (not X) == Y; consider using X ~= Y, or wrap one of the expressions in parentheses to silence
+if not x == 5 then
+end
+
+-- X <= Y <= Z is equivalent to (X <= Y) <= Z; wrap one of the expressions in parentheses to silence
+if 1 <= x <= 3 then
+end
+```