From e86cf33070c3e696a33ad51482cf9ef3b8c015f9 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 6 Apr 2026 15:33:37 +0000
Subject: [PATCH] Refine array format validation

Agent-Logs-Url: https://github.com/wesleyel/swiftui-math/sessions/56436444-e15b-4dd0-8a70-c87df1e3dc4e

Co-authored-by: wesleyel <48174882+wesleyel@users.noreply.github.com>
---
 Sources/SwiftUIMath/Internal/Syntax/Parser.swift | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Sources/SwiftUIMath/Internal/Syntax/Parser.swift b/Sources/SwiftUIMath/Internal/Syntax/Parser.swift
index 2c2c86e..0ee2f4e 100644
--- a/Sources/SwiftUIMath/Internal/Syntax/Parser.swift
+++ b/Sources/SwiftUIMath/Internal/Syntax/Parser.swift
@@ -1329,7 +1329,7 @@ extension Math {
           format.append(char)
         case "|":
           format.append(char)
-        case " ":
+        case _ where char.isWhitespace:
           continue
         default:
           self.setError(
@@ -1346,7 +1346,9 @@ extension Math {
 
       if self.error == nil && columnAlignments.isEmpty {
         self.setError(
-          .invalidEnvironment, message: "array environment requires column alignment specifiers")
+          .invalidEnvironment,
+          message: "array environment requires at least one column alignment specifier (l, c, or r)"
+        )
       }
 
       return self.error == nil ? (columnAlignments, format) : (nil, nil)