examples: update command_with_timeout.v, remove io.string_reader from write_to_child_string.v

examples/command_with_timeout.v

@@ -11,16 +11,17 @@ fn main() {
 	mut cmd := runcmd.with_context(ctx, 'sleep', '120')
 
 	// Start a command.
-	started := time.now()
-	println('Start command at ${started}')
 	cmd.start()!
+	started := time.now()
+	println('Command started at ${started}')
 
 	// Wait for command.
 	cmd.wait()!
 
 	// The `sleep 120` command would run for two minutes without a timeout.
 	// But in this example, it will time out after 10 seconds.
-	println('Command finished after ${time.now() - started}')
+	finished := time.now()
+	println('Command finished at ${finished} after ${finished - started}')
 
 	// Since command has been terminated, the state would be: `signal: 15 (SIGTERM)`
 	println('Child state: ${cmd.state}')

examples/write_to_child_stdin.v

@@ -1,4 +1,3 @@
-import io.string_reader
 import strings
 import runcmd
 
@@ -6,12 +5,11 @@ fn main() {
 	input := 'Hello from parent process!'
 
 	// Prepare reader and writer.
-	//
 	// * `reader` reads input from the parent process; it will be copied to the
 	//    standard input of the child process.
 	// * `writer` accepts data from the child process; it will be copied from the
 	//    standard output of the child process.
-	mut reader := string_reader.StringReader.new(reader: runcmd.buffer(input.bytes()), source: input)
+	mut reader := runcmd.buffer(input.bytes())
 	mut writer := strings.new_builder(4096)
 
 	// Prepare the command.