New special variable: .RECIPEPREFIX

Allows the user to reset the prefix character for introducing recipe lines
from the default (tab) to any other single character, and back again.
Also, reworked the manual to consistently use the word "recipe" to describe
the set of commands we use to update a target, instead of the various
phrases used in the past: "commands", "command lines", "command scripts",
etc.

tests/scripts/functions/eval

@@ -163,7 +163,7 @@ world');
 # See Savannah bug # 12124.
 
 run_make_test('deps: ; $(eval deps: foo)', '',
-              '#MAKEFILE#:1: *** prerequisites cannot be defined in command scripts.  Stop.',
+              '#MAKEFILE#:1: *** prerequisites cannot be defined in recipes.  Stop.',
               512);
 
 1;

tests/scripts/misc/close_stdout

@@ -3,7 +3,7 @@
 $description = "Make sure make exits with an error if stdout is full.";
 
 if (-e '/dev/full') {
-  run_make_test('', '-v > /dev/full', '#MAKE#: write error', 256);
+  run_make_test('', '-v > /dev/full', '/^#MAKE#: write error/', 256);
 }
 
 1;

tests/scripts/variables/special

@@ -50,5 +50,68 @@ all:
 # $answer = "X1 =\nX2 = all\nLAST = all foo\n";
 # &compare_output($answer, &get_logfile(1));
 
+# Test the .RECIPEPREFIX variable
+&run_make_test('
+define foo
+: foo-one \
+foo-two
+: foo-three
+	: foo-four
+endef
+
+orig: ; : orig-one
+	: orig-two \
+orig-three \
+	orig-four \
+		orig-five \\\\
+	: orig-six
+	$(foo)
+
+.RECIPEPREFIX = >
+test: ; : test-one
+>: test-two \
+test-three \
+>test-four \
+>	test-five \\\\
+>: test-six
+>$(foo)
+
+.RECIPEPREFIX =
+reset: ; : reset-one
+	: reset-two \
+reset-three \
+	reset-four \
+		reset-five \\\\
+	: reset-six
+	$(foo)
+',
+               'orig test reset',
+               ': orig-one
+: orig-two \
+orig-three \
+orig-four \
+	orig-five \\\\
+: orig-six
+: foo-one foo-two
+: foo-three
+: foo-four
+: test-one
+: test-two \
+test-three \
+test-four \
+	test-five \\\\
+: test-six
+: foo-one foo-two
+: foo-three
+: foo-four
+: reset-one
+: reset-two \
+reset-three \
+reset-four \
+	reset-five \\\\
+: reset-six
+: foo-one foo-two
+: foo-three
+: foo-four');
 
 1;