Fix Swift 6.0.3 build

There are a couple instances of trailing commas in the project
that prevents it from compiling with Swift 6.0.3. This resolves the
issues.

Author: ethan-kusters

.gitignore

@@ -46,8 +46,8 @@ playground.xcworkspace
 #
 # Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata
 # hence it is not needed unless you have added a package configuration file to your project
-# .swiftpm
 
+.swiftpm/
 .build/
 
 # CocoaPods

Sources/Subprocess/Configuration.swift

@@ -872,7 +872,7 @@ internal struct CreatedPipe {
 
     internal init(
         readFileDescriptor: TrackedFileDescriptor?,
-        writeFileDescriptor: TrackedFileDescriptor?,
+        writeFileDescriptor: TrackedFileDescriptor?
     ) {
         self.readFileDescriptor = readFileDescriptor
         self.writeFileDescriptor = writeFileDescriptor

Sources/_SubprocessCShims/process_shims.c

@@ -236,7 +236,7 @@ static int _subprocess_spawn_prefork(
         *pid = childPid;
         // Read from the pipe until pipe is closed
         // either due to exec succeeds or error is written
-        while (true) {
+        while (TRUE) {
             int childError = 0;
             ssize_t read_rc = read(pipefd[0], &childError, sizeof(childError));
             if (read_rc == 0) {

Tests/SubprocessTests/SubprocessTests+Unix.swift

@@ -938,7 +938,7 @@ extension SubprocessUnixTests {
             group.addTask {
                 return try await Subprocess.run(
                     .path("/bin/sh"),
-                    arguments: ["-c", "trap 'echo no' TERM; while true; do sleep 1; done"],
+                    arguments: ["-c", "trap 'echo no' TERM; while true; do sleep 1; done"]
                 ).terminationStatus
             }
             group.addTask {