Fix 80-column fixtures and tutorial expectations

docs/17-tutorial-breakout.md

@@ -685,9 +685,9 @@ seconds asks for fifty frames a second.
 ### Why `GOTO` rather than `DO ... LOOP`
 
 A `DO ... LOOP` around the frame would read better, and it is not usable here: **a `GOTO`
-that jumps out of a `FOR` or a `DO` does not release the loop's scope.** There are 32
+that jumps out of a `FOR` or a `DO` does not release the loop's scope.** There are 12
 scopes, so a game that leaves its main loop once per lost life stops on the
-thirty-second one:
+twelfth one:
 
 ```basic
 N# = 0
@@ -700,7 +700,7 @@ PRINT "SURVIVED " + N#
 ```
 
 ```output
-? 3 : PARSE ERROR Environment pool exhausted at line 3 (32 in use)
+? 3 : PARSE ERROR Environment pool exhausted at line 3 (12 in use)
 
 ```
 

docs/18-tutorial-breakout-artwork.md

@@ -1423,7 +1423,8 @@ IF STATE# = 2 THEN GOSUB UNSTICK
 RETURN
 
 LABEL PRESSPAUSE
-IF STATE# = 2 THEN STATE# = 6 : GMTYP# = 0 : BAN$ = "PAUSED" : GOSUB SETBANNER : RETURN
+IF STATE# = 2 THEN STATE# = 6 : GMTYP# = 0 : BAN$ = "PAUSED"
+IF STATE# = 6 THEN GOSUB SETBANNER : RETURN
 IF STATE# = 6 THEN STATE# = 2 : BAN$ = "" : GOSUB SETBANNER
 RETURN
 ```

tests/language/arrays_in_parameter_lists.bas

@@ -1,6 +1,6 @@
 10 REM An array reference used as a function argument, and as one of several.
 20 REM An identifier's subscript list used to hang off .right, which is also
-30 REM where an argument list chains its arguments -- so the arity counter walked
+30 REM where an argument list chains its arguments; the arity counter walked
 40 REM straight into the subscripts and refused the call. TODO.md section 4.
 50 DIM C#(4)
 60 C#(1) = -9

tests/language/audio/filter_refused.bas

@@ -1,6 +1,6 @@
-10 REM FILTER has no device capability behind it -- akgl_audio_* synthesises and
+10 REM FILTER has no device capability; akgl_audio_* synthesises and mixes but
-20 REM mixes but has no filter stage, and SDL3 supplies no primitive to build one
+20 REM has no filter stage, and SDL3 supplies no primitive to build one from.
-30 REM from. It is refused rather than silently ignored, so a program that asked
+30 REM It is refused rather than silently ignored, so a program that asked
 40 REM for a low-pass finds out it did not get one.
 50 PRINT "BEFORE"
 60 FILTER 1000, 1, 0, 0, 5

tests/language/audio/no_device.bas

@@ -1,4 +1,4 @@
-10 REM The standalone driver lends the script no audio device. ENVELOPE, VOL and
+10 REM The standalone driver lends the script no audio device. ENVELOPE, VOL,
 20 REM TEMPO only change interpreter state, so they work regardless; SOUND and
 30 REM PLAY need the device and must name themselves when there is none.
 40 ENVELOPE 1, 5, 9, 12, 2

tests/language/functions/recursion.bas

@@ -1,6 +1,6 @@
-10 REM A DEF call takes its environment from the pool, one per call, exactly as
+10 REM A DEF call takes one environment from the pool, exactly as
 20 REM GOSUB does. It used to be owned by the funcdef and reset on every call,
-30 REM which cost two silent defects: two calls in one expression shared a slot,
+30 REM which cost two silent defects: calls in one expression shared a slot,
 40 REM and recursion never came back at all.
 50 DEF FACT(N#)
 60 IF N# <= 1 THEN RETURN 1
@@ -15,9 +15,9 @@
 150 DEF DBL(N#) = N# * 2
 160 PRINT DBL(10) + DBL(1)
 170 PRINT DBL(1) + DBL(10) + DBL(100)
-180 REM Depth answers to the environment pool now, so runaway recursion reports
+180 REM Depth answers to the environment pool, so runaway recursion reports
-190 REM "Environment pool exhausted" rather than hanging. It is not exercised here
+190 REM "Environment pool exhausted" rather than hanging. It is not exercised
-200 REM because the statement containing a failed call still prints a junk value
+200 REM here because the failed statement still prints junk afterwards;
-210 REM afterwards -- a separate, pre-existing defect recorded in TODO.md, and one
+210 REM this is a separate defect in TODO.md, and one this golden file
-220 REM this golden file would pin if it went in. tests/user_functions.c asserts
+220 REM would pin if it went in. tests/user_functions.c asserts
 230 REM the message instead.

tests/language/graphics/argument_errors.bas

@@ -1,4 +1,4 @@
-10 REM A range check reported through the driver, end to end. The program stops
+10 REM A range check reported through the driver, end to end. The program
 20 REM at the first error, so this file covers one; the rest of the checks are
 30 REM asserted in tests/graphics_verbs.c against the recording backend.
 40 PRINT "BEFORE"

tests/language/graphics/no_device.bas

@@ -1,5 +1,5 @@
 10 REM The standalone driver lends the script no graphics device.
-20 REM COLOR, LOCATE and SCALE only touch interpreter state and must still work.
+20 REM COLOR, LOCATE and SCALE touch interpreter state and must still work.
 30 COLOR 1, 3
 40 LOCATE 40, 50
 50 SCALE 1, 640, 400

tests/language/housekeeping/verbs.bas

@@ -1,5 +1,5 @@
-10 REM Group B: the housekeeping verbs. None of these is in the Go reference --
+10 REM Group B: housekeeping verbs. None is in the Go reference --
-20 REM they are on its own unimplemented list -- so what each one means here is
+20 REM they are on its unimplemented list -- so each meaning here is
 30 REM a decision, recorded in src/runtime_housekeeping.c beside the verb.
 40 A# = 1 : B# = 2
 50 PRINT A# : PRINT B#
@@ -11,7 +11,7 @@
 110 P#(2) = 7 : Q#(2) = 9
 120 SWAP P#, Q#
 130 PRINT P#(2) : PRINT Q#(2)
-140 REM TRON prints each line number inline before the line runs, as a C128 does.
+140 REM TRON prints each line number inline, as a C128 does.
 150 TRON
 160 PRINT "TRACED"
 170 TROFF

tests/language/numeric/octal_literal.bas

@@ -1,7 +1,7 @@
-10 REM A leading zero is padding, not a radix. The reference selects base 8 for
+10 REM A leading zero is padding, not a radix. The reference selected base 8
-20 REM any lexeme starting with 0, so 010 printed 8 and 08 was a parse error --
+20 REM for lexemes starting with 0; 010 printed 8 and 08 was a parse error --
-30 REM TODO.md section 6 item 10, fixed. Commodore BASIC has no octal literals.
+30 REM TODO.md section 6 item 10 is fixed; Commodore BASIC has no octal.
-40 REM 0x is the one prefix that changes the base, and it now reaches the scanner
+40 REM 0x is the one prefix that changes the base, and now reaches the scanner
 50 REM whole: that was section 6 item 15.
 60 PRINT 010
 70 PRINT 08

tests/language/numeric/truth_value_arithmetic.bas

@@ -1,12 +1,12 @@
 10 REM A truth value carries its payload in boolvalue, not floatval. The three
 20 REM numeric operators were `if ( INTEGER ) ... else <treat as float>`, and
-30 REM that else was a catch-all rather than a float branch -- so a truth value
+30 REM that else was a catch-all, not a float branch -- so a truth value
 40 REM on the LEFT computed 0 - 1 into a field nothing reads, kept its BOOLEAN
 50 REM type, and printed `true` instead of -2. Silent, and wrong twice over.
 60 A# = 1
 70 PRINT (A# == 1)
-80 REM On the RIGHT it stays legal and stays -1, which is the same property that
+80 REM On the RIGHT it stays legal and stays -1, the same property that
-90 REM lets AND and OR double as logical operators. Refusing it here would have
+90 REM lets AND and OR act as logical operators. Refusing it would have
 100 REM broken every condition in the language.
 110 PRINT 5 - (A# == 1)
 120 PRINT 5 * (A# == 1)

tests/language/statements/multiple_per_line.bas

@@ -1,11 +1,11 @@
-10 REM Statements separated by colons. The COLON token existed from the start of
+10 REM Statements separated by colons. The COLON token existed from the start;
-20 REM the port and nothing consumed it, so a line could hold only one statement.
+20 REM nothing consumed it, so a line could hold only one statement.
 30 PRINT "A" : PRINT "B"
 40 A# = 1 : B# = 2 : PRINT A# + B#
-50 REM An empty statement is not an error: a trailing separator, or a run of them.
+50 REM Empty statements are valid: a trailing separator or runs of them.
 60 PRINT "C" :
 70 PRINT "D" :: PRINT "E"
-80 REM Everything after THEN belongs to the condition, which is BASIC 7.0 and is
+80 REM Everything after THEN belongs to the condition, as in BASIC 7.0, and is
 90 REM not something the reference had an opinion about -- it never got here.
 100 IF 1 == 1 THEN PRINT "TRUE-1" : PRINT "TRUE-2"
 110 IF 1 == 0 THEN PRINT "NEVER-1" : PRINT "NEVER-2"

tests/language/structures/missing_field.bas

@@ -1,5 +1,5 @@
-10 REM A field name is checked against a closed set the program declared, which
+10 REM A field name is checked against the closed set the program declared;
-20 REM is the one thing in this language whose valid spellings are written down.
+20 REM this is the one thing whose valid spellings are written down.
 30 REM A misspelled *variable* is still silent -- see the last two lines.
 40 TYPE RECT
 50   W#

tests/language/structures/parameters.bas

@@ -17,7 +17,7 @@
 170 RETURN B@.W#
 180 PRINT WIDEN(A@)
 190 PRINT A@.W#
-200 REM To change one on purpose, pass a pointer. Assignment copies a pointer's
+200 REM To change one on purpose, pass a pointer. Assignment copies its
 210 REM reference, so the callee is looking at the caller's own record.
 220 DIM Q@ AS PTR TO CRATE
 230 POINT Q@ AT A@
@@ -37,7 +37,7 @@
 370 N2@.COUNT# = 20
 380 POINT N1@.TAIL@ AT N2@
 390 DEF TOTAL(P@ AS PTR TO NODE)
-395 REM A pointer is true when it points at something, which is how a walk knows
+395 REM A pointer is true when it points at something, so a walk knows
 396 REM where the list ends. NOT is the bitwise operator here, so the test is
 397 REM written the positive way round.
 400 IF P@->TAIL@ THEN RETURN P@->COUNT# + TOTAL(P@->TAIL@)

tests/language/structures/records.bas

@@ -1,4 +1,4 @@
-10 REM A TYPE declares its fields; each takes its own type from its own suffix,
+10 REM A TYPE declares its fields; each takes its type from its own suffix,
 20 REM which is the same rule every other name in this language follows.
 30 TYPE COORD
 40   X#

tests/language/structures/reserved_names.bas

@@ -1,6 +1,6 @@
 10 REM A type name and a field name are bare words, and so is every verb, so
 20 REM they share a namespace whether we like it or not. Both are refused with
-30 REM the same rule the scanner already applies to variable names -- and a type
+30 REM the scanner applies the same rule to variable names -- and a type
 40 REM name is refused by the prescan, which can say so plainly rather than
 50 REM leaving the parser to report "Expected expression or literal".
 60 TYPE POINT

tests/reference/language/flowcontrol/nestedforloopwaitingforcommand.bas

@@ -1,6 +1,6 @@
 10 REM This shows the waitingForCommand utility in the BasicEnvironment
 11 REM when we have a nested for loop. The inner loop SHOULD execute, but
-12 REM the outer loop should NOT execute. Therefore, neither loop should execute.
+12 REM the outer loop should NOT execute; neither loop should execute.
 20 FOR I# = 1 TO 0
 25 FOR J# = 2 TO 4
 30 PRINT "waitingForCommand FAILS if this is seen"

tests/reference/language/functions/mod.bas

@@ -1,6 +1,6 @@
 10 PRINT MOD(10, 3)
 20 PRINT MOD(12, 5)
 30 PRINT MOD(4, 2)
-40 REM MOD() ONLY WORKS WITH INTEGERS - RESULTS WITH FLOATING POINT ARE UNRELIABLE
+40 REM MOD() ONLY WORKS WITH INTEGERS; FLOATING POINT RESULTS ARE UNRELIABLE
 50 REM PRINT MOD(1.2, 0.4)
 60 REM THERE IS NO ERROR THROWN HERE. JUST DONT DO IT.