feat: infix printing for logical operations

Author: MilesCranmer

Project.toml

@@ -1,7 +1,7 @@
 name = "DynamicExpressions"
 uuid = "a40a106e-89c9-4ca8-8020-a735e8728b6b"
 authors = ["MilesCranmer <miles.cranmer@gmail.com>"]
-version = "1.9.2"
+version = "1.9.3"
 
 [deps]
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"

src/Strings.jl

@@ -82,7 +82,7 @@ end
 
 # Vector of chars is faster than strings, so we use that.
 function combine_op_with_inputs(op, l, r)::Vector{Char}
-    if first(op) in ('+', '-', '*', '/', '^', '.')
+    if first(op) in ('+', '-', '*', '/', '^', '.', '>', '<', '=') || op == "!="
         # "(l op r)"
         out = ['(']
         append!(out, l)