Update test scripts for SwiftShell 2.0.

Finally.

SwiftShellTests/Scripts/callswiftscriptfromswift.swift

@@ -2,4 +2,4 @@
 
 import SwiftShell
 
-run("cat onetwothree.txt") |> run("./print_linenumbers.swift") |>> standardoutput
+try! run("cat","onetwothree.txt").runAndPrint("./print_linenumbers.swift")

SwiftShellTests/Scripts/readandwritefiles.swift

@@ -2,31 +2,31 @@
 
 import SwiftShell
 
-let filepath = tempdirectory / "newfile.txt"
+let filepath =  main.tempdirectory + "/newfile.txt"
 
 // File doesn't exist. Create it.
-let file1 = open(forWriting: filepath )
+let file1 = try! open(forWriting: filepath)
 file1.writeln("line 1")
-file1.closeStream()
+file1.close()
 
 // File does exist. Append it.
-let file2 = open(forWriting: filepath)
+let file2 =  try! open(forWriting: filepath)
 file2.writeln("line 2")
-file2.closeStream()
+file2.close()
 
 // Test file.
-let file3 = open(filepath)
+let file3 = try! open(filepath)
 if file3.read() != "line 1\nline 2\n" {
-	printErrorAndExit( "newfile.txt should contain 'line 1\\n line 2\\n'." )
+	exit(errormessage: "newfile.txt should contain 'line 1\\n line 2\\n'." )
 }
 
 // File exists. Overwrite it.
-let file4 = open(forWriting: filepath, overwrite: true)
+let file4 = try! open(forWriting: filepath, overwrite: true)
 file4.write("file now contains only this")
-file4.closeStream()
+file4.close()
 
 // Test file.
-let file5 = open(filepath)
+let file5 = try! open(filepath)
 if file5.read() != "file now contains only this" {
-	printErrorAndExit( "newfile.txt should contain 'file now contains only this'." )
+	exit(errormessage: "newfile.txt should contain 'file now contains only this'." )
 }

SwiftShellTests/Scripts/stream_out.swift

@@ -2,4 +2,4 @@
 
 import SwiftShell
 
-run("echo this is streamed") |> run("wc -w") |>> standardoutput
+ try! run("echo","this is streamed").runAndPrint("wc", "-w")