Get rid of backticks in headers and outdated comment

docs/en/query_language/functions/comparison_functions.md

@@ -15,18 +15,16 @@ For example, you can’t compare a date with a string. You have to use a functio
 
 Strings are compared by bytes. A shorter string is smaller than all strings that start with it and that contain at least one more character.
 
-Note. Up until version 1.1.54134, signed and unsigned numbers were compared the same way as in C++. In other words, you could get an incorrect result in cases like SELECT 9223372036854775807 \> -1. This behavior changed in version 1.1.54134 and is now mathematically correct.
-
 ## equals, a = b and a == b operator {#function-equals}
 
-## notEquals, a ! operator= b and a `<>` b {#function-notequals}
+## notEquals, a ! operator= b and a <> b {#function-notequals}
 
-## less, `< operator` {#function-less}
+## less, < operator {#function-less}
 
-## greater, `> operator` {#function-greater}
+## greater, > operator {#function-greater}
 
-## lessOrEquals, `<= operator` {#function-lessorequals}
+## lessOrEquals, <= operator {#function-lessorequals}
 
-## greaterOrEquals, `>= operator` {#function-greaterorequals}
+## greaterOrEquals, >= operator {#function-greaterorequals}
 
 [Original article](https://clickhouse.tech/docs/en/query_language/functions/comparison_functions/) <!--hide-->