Index: src/tests/.expect/io.txt
===================================================================
--- src/tests/.expect/io.txt	(revision d3950125f9b8e14c660f3f5da742e6ad404ee9a7)
+++ src/tests/.expect/io.txt	(revision 86f384bba584191182741295324fe1ca6656b380)
@@ -4,6 +4,11 @@
 123
 
+opening delimiters 
 x (1 x [2 x {3 x =4 x $5 x £6 x ¥7 x ¡8 x ¿9 x «10
+
+closing delimiters 
 1, x 2. x 3; x 4! x 5? x 6% x 7¢ x 8» x 9) x 10] x 11} x 
+
+opening/closing delimiters 
 x`1`x'2'x"3"x:4:x 5 x	6	x
 7
@@ -15,5 +20,11 @@
 10
 x 
+
+override opening/closing delimiters 
 x ( 1 ) x 2 , x 3 :x: 4
+
+input bacis types 
+
+output basic types 
 A 
 1 2 3 4 5 6 7 8
@@ -21,4 +32,8 @@
 1.1+2.3i 1.1-2.3i 1.1-2.3i
 
+tuples 
+1, 2, 3 3, 4, 5
+
+toggle separator 
 1.11.21.3
 1.1+2.3i1.1-2.3i1.1-2.3i
@@ -26,12 +41,16 @@
 abcxyz 
 
+change separator 
+from "  "to " , $"
 1.1, $1.2, $1.3
 1.1+2.3i, $1.1-2.3i, $1.1-2.3i
 abc, $xyz, $
+1, 2, 3, $3, 4, 5
 
-1, 2, 3, 4
-
-1, $2, $3 ", $"
-1 2 3 " "
+from ", $"to " "
+1.1 1.2 1.3
+1.1+2.3i 1.1-2.3i 1.1-2.3i
+abc xyz 
+1, 2, 3 3, 4, 5
 
  1 2 3 
@@ -49,7 +68,7 @@
 1 2 3
 
-1 2 3 4 " "
-1, 2, 3, 4 ", "
-1, 2, 3, 4
+1 2 3 3 4 5 " "
+1, 2, 3 3, 4, 5 ", "
+1, 2, 3 3, 4, 5
 
 3, 4, a, 7.2
@@ -57,3 +76,3 @@
 3 4 a 7.2
  3 4 a 7.234a7.23 4 a 7.2
-3-4-a-7.2^3^4-3-4-a-7.2
+3-4-a-7.2^3^4^3-4-a-7.2
Index: src/tests/io.c
===================================================================
--- src/tests/io.c	(revision d3950125f9b8e14c660f3f5da742e6ad404ee9a7)
+++ src/tests/io.c	(revision 86f384bba584191182741295324fe1ca6656b380)
@@ -10,6 +10,6 @@
 // Created On       : Wed Mar  2 16:56:02 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Sat Jul  1 16:21:07 2017
-// Update Count     : 58
+// Last Modified On : Sun Jul  2 09:40:58 2017
+// Update Count     : 68
 // 
 
@@ -42,6 +42,6 @@
 	sout | endl;
 
+	sout | "opening delimiters" | endl;
 	sout
-		// opening delimiters
 		| "x (" | 1
 		| "x [" | 2
@@ -54,7 +54,8 @@
 		| "x ¿" | 9
 		| "x «" | 10
-		| endl;
+		| endl | endl;
+
+	sout | "closing delimiters" | endl;
 	sout
-		// closing delimiters
 		| 1 | ", x"
 		| 2 | ". x"
@@ -68,7 +69,8 @@
 		| 10 | "] x"
 		| 11 | "} x"
-		| endl;
+		| endl | endl;
+
+	sout | "opening/closing delimiters" | endl;
 	sout
-		// opening-closing delimiters
 		| "x`" | 1 | "`x'" | 2
 		| "'x\"" | 3 | "\"x:" | 4
@@ -76,11 +78,15 @@
 		| "\tx\f" | 7 | "\fx\v" | 8
 		| "\vx\n" | 9 | "\nx\r" | 10
-		| "\rx" |
-		endl;
+		| "\rx"
+		| endl | endl;
+
+	sout | "override opening/closing delimiters" | endl;
 	sout | "x ( " | 1 | " ) x" | 2 | " , x" | 3 | " :x: " | 4 | endl;
+	sout | endl;
 
 	ifstream in;										// create / open file
 	open( &in, "io.data", "r" );
 
+	sout | "input bacis types" | endl;
 	&in | &c											// character
 		| &si | &usi | &i | &ui | &li | &uli | &lli | &ulli	// integral
@@ -88,5 +94,7 @@
 		| &fc | &dc | &ldc								// floating-point complex
 		| cstr( s1 ) | cstr( s2, size );				// C string, length unchecked and checked
+	sout | endl;
 
+	sout | "output basic types" | endl;
 	sout | c | ' ' | endl								// character
 		| si | usi | i | ui | li | uli | lli | ulli | endl // integral
@@ -94,4 +102,11 @@
 		| fc | dc | ldc | endl;							// complex
 	sout | endl;
+
+	sout | "tuples" | endl;
+	[int, [ int, int ] ] t1 = [ 1, [ 2, 3 ] ], t2 = [ 3, [ 4, 5 ] ];
+	sout | t1 | t2 | endl;								// print tuple
+	sout | endl;
+
+	sout | "toggle separator" | endl;
 	sout | f | "" | d | "" | ld | endl					// floating point without separator
 		| sepDisable | fc | dc | ldc | sepEnable | endl	// complex without separator
@@ -100,19 +115,20 @@
 	sout | endl;
 
+	sout | "change separator" | endl;
+	sout | "from \" " | sepGet( sout ) | "\"";
 	sepSet( sout, ", $" );								// change separator, maximum of 15 characters
+	sout | "to \" " | sepGet( sout ) | "\"" | endl;
 	sout | f | d | ld | endl
 		| fc | dc | ldc | endl
-		| s1 | s2 | endl;
+		| s1 | s2 | endl
+		| t1 | t2 | endl;								// print tuple
 	sout | endl;
-
-	[int, int] t1 = [1, 2], t2 = [3, 4];
-	sout | t1 | t2 | endl;								// print tuple
-	sout | endl;
-
-	sepSet( sout, " " );
-	sepSet( sout, ", $" );								// set separator from " " to ", $"
-	sout | 1 | 2 | 3 | " \"" | sepGet( sout ) | "\"" | endl;
-	sepSet( sout, " " );								// reset separator to " "
-	sout | 1 | 2 | 3 | " \"" | sepGet( sout ) | "\"" | endl;
+	sout | "from \"" | sepGet( sout ) | "\"";
+	sepSet( sout, " " );								// restore separator
+	sout | "to \"" | sepGet( sout ) | "\"" | endl;
+	sout | f | d | ld | endl
+		| fc | dc | ldc | endl
+		| s1 | s2 | endl
+		| t1 | t2 | endl;								// print tuple
 	sout | endl;