Guard browser OPFS custom session INI seed

wasm-port/tests/browser/interp_smoke.html

@@ -4600,6 +4600,20 @@
       return `T${toolNo} P${pocketNo} Z${zOffset} D${diameter} ${comment}\n`;
     }
 
+    function opfsCustomSessionIniText(machineId, parameterFilename, toolTableFilename) {
+      return [
+        "[EMC]",
+        `MACHINE = ${machineId}`,
+        "",
+        "[RS274NGC]",
+        `PARAMETER_FILE = ${parameterFilename}`,
+        "",
+        "[EMCIO]",
+        `TOOL_TABLE = ${toolTableFilename}`,
+        "",
+      ].join("\n");
+    }
+
     async function verifyOpfsSavedText(label, loadActualText, expectedLines) {
       verifyExpectedOutput(label, await loadActualText(), expectedLines.join("\n"));
     }
@@ -9502,17 +9516,11 @@
       const iniFileParameterWasmPath = opfsCustomSessionWasmPath(iniFileParameterFilename);
       const iniFileToolTableWasmPath = opfsCustomSessionWasmPath(iniFileToolTableFilename);
       const browserIniFileTextPaths = await saveMachineTextFiles(iniFileMachineId, {
-        ini: [
-          "[EMC]",
-          `MACHINE = ${iniFileMachineId}`,
-          "",
-          "[RS274NGC]",
-          `PARAMETER_FILE = ${iniFileParameterFilename}`,
-          "",
-          "[EMCIO]",
-          `TOOL_TABLE = ${iniFileToolTableFilename}`,
-          "",
-        ].join("\n"),
+        ini: opfsCustomSessionIniText(
+          iniFileMachineId,
+          iniFileParameterFilename,
+          iniFileToolTableFilename,
+        ),
       });
       assertMachineTextStorePaths(
         "opfs_save_ini_named_machine_text_files_staging",
@@ -9636,17 +9644,11 @@
       const explicitParameterWasmPath = opfsCustomSessionWasmPath(explicitParameterFilename);
       const explicitToolTableWasmPath = opfsCustomSessionWasmPath(explicitToolTableFilename);
       const browserIniOverrideTextPaths = await saveMachineTextFiles(iniOverrideMachineId, {
-        ini: [
-          "[EMC]",
-          `MACHINE = ${iniOverrideMachineId}`,
-          "",
-          "[RS274NGC]",
-          "PARAMETER_FILE = browser-ignored.var",
-          "",
-          "[EMCIO]",
-          "TOOL_TABLE = browser-ignored-tool.tbl",
-          "",
-        ].join("\n"),
+        ini: opfsCustomSessionIniText(
+          iniOverrideMachineId,
+          "browser-ignored.var",
+          "browser-ignored-tool.tbl",
+        ),
       });
       assertMachineTextStorePaths(
         "opfs_save_ini_override_machine_text_files_staging",