Documentation fixes

* doc/ref/api-compound.texi:
* doc/ref/api-control.texi:
* doc/ref/api-data.texi: Fix typos and clarify.

doc/ref/api-compound.texi

@@ -1258,14 +1258,14 @@ is an ordinary array of rank 1 with lower bound 0 in dimension 0.
 is an ordinary array of rank 1 with lower bound 2 in dimension 0.
 
 @item #2((1 2 3) (4 5 6))
-is a non-uniform array of rank 2; a 3@cross{}3 matrix with index ranges 0..2
+is a non-uniform array of rank 2; a 2@cross{}3 matrix with index ranges 0..1
 and 0..2.
 
 @item #u32(0 1 2)
 is a uniform u8 array of rank 1.
 
 @item #2u32@@2@@3((1 2) (2 3))
-is a uniform u8 array of rank 2 with index ranges 2..3 and 3..4.
+is a uniform u32 array of rank 2 with index ranges 2..3 and 3..4.
 
 @item #2()
 is a two-dimensional array with index ranges 0..-1 and 0..-1, i.e.@:
@@ -2877,7 +2877,7 @@ convenient definition that indicates the number of fields in
 @code{standard-vtable-fields}.
 
 @defvr {Scheme Variable} standard-vtable-fields
-A string containing the orderedq set of fields that a vtable must have.
+A string containing the ordered set of fields that a vtable must have.
 @end defvr
 
 @defvr {Scheme Variable} vtable-offset-user

doc/ref/api-control.texi

@@ -168,7 +168,7 @@ Each @code{cond}-clause must look like this:
 (@var{test} @var{expression} @dots{})
 @end lisp
 
-where @var{test} and @var{expression} are arbitrary expression, or like
+where @var{test} and @var{expression} are arbitrary expressions, or like
 this
 
 @lisp
@@ -178,7 +178,7 @@ this
 where @var{expression} must evaluate to a procedure.
 
 The @var{test}s of the clauses are evaluated in order and as soon as one
-of them evaluates to a true values, the corresponding @var{expression}s
+of them evaluates to a true value, the corresponding @var{expression}s
 are evaluated in order and the last value is returned as the value of
 the @code{cond}-expression.  For the @code{=>} clause type,
 @var{expression} is evaluated and the resulting procedure is applied to
@@ -894,7 +894,7 @@ a new values object, and copies into it the @var{n} values starting from
 @var{base}.
 
 Currently this creates a list and passes it to @code{scm_values}, but we
-expect that in the future we will be able to use more a efficient
+expect that in the future we will be able to use a more efficient
 representation.
 @end deftypefn
 

doc/ref/api-data.texi

@@ -1712,7 +1712,7 @@ starts from 0 for the least significant bit.
 
 @deffn {Scheme Procedure} ash n count
 @deffnx {C Function} scm_ash (n, count)
-Return @math{floor(n * 2^count)}.
+Return @math{floor(n * 2^{count})}.
 @var{n} and @var{count} must be exact integers.
 
 With @var{n} viewed as an infinite-precision twos-complement
@@ -5141,7 +5141,7 @@ mapping consistently:
 @lisp
 ;; 1=red, 2=green, 3=purple
 
-(if (eq? (colour-of car) 1)
+(if (eq? (colour-of vehicle) 1)
     ...)
 @end lisp
 
@@ -5154,7 +5154,7 @@ defining constants:
 (define green 2)
 (define purple 3)
 
-(if (eq? (colour-of car) red)
+(if (eq? (colour-of vehicle) red)
     ...)
 @end lisp
 
@@ -5163,7 +5163,7 @@ But the simplest and clearest approach is not to use numbers at all, but
 symbols whose names specify the colours that they refer to:
 
 @lisp
-(if (eq? (colour-of car) 'red)
+(if (eq? (colour-of vehicle) 'red)
     ...)
 @end lisp
 
@@ -5185,15 +5185,15 @@ Then a car's combined property set could be naturally represented and
 manipulated as a list of symbols:
 
 @lisp
-(properties-of car1)
+(properties-of vehicle1)
 @result{}
 (red manual unleaded power-steering)
 
-(if (memq 'power-steering (properties-of car1))
-    (display "Unfit people can drive this car.\n")
-    (display "You'll need strong arms to drive this car!\n"))
+(if (memq 'power-steering (properties-of vehicle1))
+    (display "Unfit people can drive this vehicle.\n")
+    (display "You'll need strong arms to drive this vehicle!\n"))
 @print{}
-Unfit people can drive this car.
+Unfit people can drive this vehicle.
 @end lisp
 
 Remember, the fundamental property of symbols that we are relying on