trim whitespace. (#2915)

src/Misc/contentHash/dotnetRuntime/linux-arm

@@ -1 +1 @@
-7539d33c35b0bc94ee67e3c0de1a6bac5ef89ce8e8efaa110131fa0520a54fb4
+7539d33c35b0bc94ee67e3c0de1a6bac5ef89ce8e8efaa110131fa0520a54fb4

src/Misc/contentHash/dotnetRuntime/linux-arm64

@@ -1 +1 @@
-d71a31f9a17e1a41d6e1edea596edfa68a0db5948ed160e86f2154a547f4dd10
+d71a31f9a17e1a41d6e1edea596edfa68a0db5948ed160e86f2154a547f4dd10

src/Misc/contentHash/dotnetRuntime/linux-x64

@@ -1 +1 @@
-3c2f700d8a995efe7895614ee07d9c7880f872d214b45983ad6163e1931870ab
+3c2f700d8a995efe7895614ee07d9c7880f872d214b45983ad6163e1931870ab

src/Misc/contentHash/dotnetRuntime/osx-arm64

@@ -1 +1 @@
-b2d85c95ecad13d352f4c7d31c64dbb0d9c6381b48fa5874c4c72a43a025a8a1
+b2d85c95ecad13d352f4c7d31c64dbb0d9c6381b48fa5874c4c72a43a025a8a1

src/Misc/contentHash/dotnetRuntime/osx-x64

@@ -1 +1 @@
-417d835c1a108619886b4bb5d25988cb6c138eb7b4c00320b1d9455c5630bff9
+417d835c1a108619886b4bb5d25988cb6c138eb7b4c00320b1d9455c5630bff9

src/Misc/contentHash/dotnetRuntime/win-arm64

@@ -1 +1 @@
-8f35aaecfb53426ea10816442e23065142bab9dd0fb712a29e0fc471d13c44ac
+8f35aaecfb53426ea10816442e23065142bab9dd0fb712a29e0fc471d13c44ac

src/Misc/contentHash/dotnetRuntime/win-x64

@@ -1 +1 @@
-811c7debdfc54d074385b063b83c997e5360c8a9160cd20fe777713968370063
+811c7debdfc54d074385b063b83c997e5360c8a9160cd20fe777713968370063

src/Test/L0/PackagesTrimL0.cs

@@ -273,5 +273,29 @@ public async Task RunnerLayoutParts_CheckExternalsHash()
                 Assert.True(string.Equals(hashResult, File.ReadAllText(externalsHashFile).Trim()), $"Hash mismatch for externals. You might need to update `Misc/contentHash/externals/{BuildConstants.RunnerPackage.PackageName}` or check if `hashFiles.ts` ever changed recently.");
             }
         }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Common")]
+        public Task RunnerLayoutParts_ContentHashFilesNoNewline()
+        {
+            using (TestHostContext hc = new(this))
+            {
+                Tracing trace = hc.GetTrace();
+
+                var dotnetRuntimeHashFile = Path.Combine(TestUtil.GetSrcPath(), $"Misc/contentHash/dotnetRuntime/{BuildConstants.RunnerPackage.PackageName}");
+                var dotnetRuntimeHash = File.ReadAllText(dotnetRuntimeHashFile);
+                trace.Info($"Current hash: {dotnetRuntimeHash}");
+
+                var externalsHashFile = Path.Combine(TestUtil.GetSrcPath(), $"Misc/contentHash/externals/{BuildConstants.RunnerPackage.PackageName}");
+                var externalsHash = File.ReadAllText(externalsHashFile);
+                trace.Info($"Current hash: {externalsHash}");
+
+                Assert.False(externalsHash.Any(x => char.IsWhiteSpace(x)), $"Found whitespace in externals hash file.");
+                Assert.False(dotnetRuntimeHash.Any(x => char.IsWhiteSpace(x)), $"Found whitespace in dotnet runtime hash file.");
+
+                return Task.CompletedTask;
+            }
+        }
     }
 }