Fix whitespace in dotted comparison chains

src/chisels.jl

@@ -101,8 +101,16 @@ function infix_op_call_op(node::JuliaSyntax.GreenNode)
     return children[op_index]
 end
 
+# Comparison leaf or a dotted comparison leaf (.<)
 function is_comparison_leaf(node::JuliaSyntax.GreenNode)
-    return is_leaf(node) && JuliaSyntax.is_prec_comparison(node)
+    if is_leaf(node) && JuliaSyntax.is_prec_comparison(node)
+        return true
+    elseif !is_leaf(node) && JuliaSyntax.kind(node) === K"." &&
+        n_children(node) == 2 && is_comparison_leaf(verified_children(node)[2])
+        return true
+    else
+        return false
+    end
 end
 
 function is_operator_leaf(node::JuliaSyntax.GreenNode)

test/runtests.jl

@@ -157,6 +157,9 @@ end
         @test format_string("a$(sp)<=$(sp)b$(sp)>=$(sp)c") == "a <= b >= c"
         @test format_string("a$(sp)<$(sp)b$(sp)>=$(sp)c") == "a < b >= c"
         @test format_string("a$(sp)<$(sp)b$(sp)<$(sp)c") == "a < b < c"
+        # Dotted chains
+        @test format_string("a$(sp).<=$(sp)b$(sp).>=$(sp)c") == "a .<= b .>= c"
+        @test format_string("a$(sp).<$(sp)b$(sp).<$(sp)c") == "a .< b .< c"
     end
 end