From 009cac0a2bf64711f57a4c541f93f98bd173a8b3 Mon Sep 17 00:00:00 2001
From: Dominique Luna <dluna132@gmail.com>
Date: Fri, 27 Oct 2023 17:53:28 -0400
Subject: [PATCH] fix #769

---
 src/fst.jl                   | 4 ++++
 src/styles/blue/pretty.jl    | 2 +-
 src/styles/default/pretty.jl | 2 +-
 src/styles/sciml/pretty.jl   | 2 +-
 test/issues.jl               | 7 +++++++
 5 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/fst.jl b/src/fst.jl
index 7f68128d1..e8f8502bc 100644
--- a/src/fst.jl
+++ b/src/fst.jl
@@ -1179,3 +1179,7 @@ Checks if the binary operation is a dot operation (e.g. `x.y`, `x..z`, `x...z`).
 function is_dot_op(x::CSTParser.EXPR)
     op_kind(x) in (Tokens.DDDOT, Tokens.DDOT, Tokens.DDOTS)
 end
+
+function is_isa(x::CSTParser.EXPR)
+    CSTParser.isoperator(x) && x.val == "isa"
+end
diff --git a/src/styles/blue/pretty.jl b/src/styles/blue/pretty.jl
index a225236de..5c01725d0 100644
--- a/src/styles/blue/pretty.jl
+++ b/src/styles/blue/pretty.jl
@@ -145,7 +145,7 @@ function p_binaryopcall(
         add_node!(t, Whitespace(1), s)
         add_node!(t, pretty(style, op, s), s, join_lines = true)
         nest ? add_node!(t, Placeholder(1), s) : add_node!(t, Whitespace(1), s)
-    elseif !(CSTParser.is_in(op) || CSTParser.is_elof(op)) && (
+    elseif !(CSTParser.is_in(op) || CSTParser.is_elof(op) || is_isa(op)) && (
         nospace || (
             !CSTParser.is_anon_func(op) && precedence(op) in (
                 CSTParser.RationalOp,
diff --git a/src/styles/default/pretty.jl b/src/styles/default/pretty.jl
index 4efde5b95..585ac53ee 100644
--- a/src/styles/default/pretty.jl
+++ b/src/styles/default/pretty.jl
@@ -1602,7 +1602,7 @@ function p_binaryopcall(
         add_node!(t, Whitespace(1), s)
         add_node!(t, pretty(style, op, s), s, join_lines = true)
         nest ? add_node!(t, Placeholder(1), s) : add_node!(t, Whitespace(1), s)
-    elseif !(CSTParser.is_in(op) || CSTParser.is_elof(op)) && (
+    elseif !(CSTParser.is_in(op) || CSTParser.is_elof(op) || is_isa(op)) && (
         nospace || (
             !CSTParser.is_anon_func(op) &&
             precedence(op) in (CSTParser.PowerOp, CSTParser.DeclarationOp, CSTParser.DotOp)
diff --git a/src/styles/sciml/pretty.jl b/src/styles/sciml/pretty.jl
index cdd37a5b9..cfa922e5c 100644
--- a/src/styles/sciml/pretty.jl
+++ b/src/styles/sciml/pretty.jl
@@ -134,7 +134,7 @@ function p_macrocall(ys::SciMLStyle, cst::CSTParser.EXPR, s::State)
         #
         # No:
         # `@parameters a = a b = b`
-        n = pretty(style, a, s, nospace = nospace)
+        n = pretty(style, a, s; nospace = nospace)
         if CSTParser.ismacroname(a)
             add_node!(t, n, s, join_lines = true)
             if length(args) > 0
diff --git a/test/issues.jl b/test/issues.jl
index baf4292cf..d97d5eae4 100644
--- a/test/issues.jl
+++ b/test/issues.jl
@@ -1763,4 +1763,11 @@
         s1 = format_text(s, MinimalStyle())
         @test format_text(s1, MinimalStyle()) == s
     end
+
+    @testset "769" begin
+        s = raw"""
+        @assert x isa Tuple \"msg\"
+        """
+        @test format_text(s, SciMLStyle()) == s
+    end
 end