Convert single null #input sections to empty (#6376)

Author: philrz

book/src/super-sql/declarations/constants.md

@@ -45,7 +45,7 @@ const ABC = [
 ]
 values ABC
 # input
-null
+
 # expected output
 ["A","B","C"]
 ```

book/src/super-sql/declarations/functions.md

@@ -115,7 +115,7 @@ _A simple recursive function_
 fn fact(n): n<=1 ? 1 : n*fact(n-1)
 values fact(5)
 # input
-null
+
 # expected output
 120
 ```
@@ -176,7 +176,7 @@ fn apply(a,val): (
 )
 values apply([1,2,3], 1)
 # input
-null
+
 # expected output
 "val" no such field at line 3, column 18:
   | collect(this+val)
@@ -193,7 +193,7 @@ fn apply(a,val): (
 )
 values apply([1,2,3], 1)
 # input
-null
+
 # expected output
 [2,3,4]
 ```

book/src/super-sql/declarations/queries.md

@@ -44,7 +44,7 @@ _Simplest named query_
 let hello = (values 'hello, world')
 from hello
 # input
-null
+
 # expected output
 "hello, world"
 ```
@@ -58,7 +58,7 @@ _Use an array subquery if multiple values expected_
 let q = (values 1,2,3)
 values [q]
 # input
-null
+
 # expected output
 [1,2,3]
 ```
@@ -74,7 +74,7 @@ let q2 = (values 3,4)
 let q3 = (values 5)
 values {a:[q1],b:[q2],c:q3}
 # input
-null
+
 # expected output
 {a:[1,2,3],b:[3,4],c:5}
 ```

book/src/super-sql/expressions/arithmetic.md

@@ -24,7 +24,7 @@ where `<expr>` is any [expression](intro.md) that results in a number type.
 # spq
 values 2*3+1, 11%5, 1/0, "foo"+"bar", +1, -1
 # input
-null
+
 # expected output
 7
 1

book/src/super-sql/expressions/cast.md

@@ -225,7 +225,7 @@ values
   cast(80::uint16, 'port'),
   cast(cast(80, <uint16>), 'port')
 # input
-null
+
 # expected output
 80::(port=uint16)
 80::(port=uint16)

book/src/super-sql/expressions/comparisons.md

@@ -82,7 +82,7 @@ _Various scalar comparisons_
 # spq
 values 1 > 2, 1 < 2, "b" > "a", 1 > "a", 1 > x
 # input
-null
+
 # expected output
 false
 true

book/src/super-sql/expressions/concat.md

@@ -36,7 +36,7 @@ _Cast non-string values to concatenate_
 # spq
 values "foo" || 123::string
 # input
-null
+
 # expected output
 "foo123"
 ```

book/src/super-sql/expressions/exists.md

@@ -22,7 +22,7 @@ _Simple example showing true for non-empty result_
 # spq
 values exists (values 1,2,3)
 # input
-null
+
 # expected output
 true
 ```
@@ -40,7 +40,7 @@ WHERE EXISTS (
     FROM Orders
 )
 # input
-null
+
 # expected output
 {s:"there are orders in the system"}
 ```

book/src/super-sql/expressions/functions.md

@@ -85,7 +85,7 @@ _Sample calls to various built-in functions_
 # spq
 values pow(2,3), lower("ABC")+upper("def"), typeof(1)
 # input
-null
+
 # expected output
 8.
 "abcDEF"
@@ -100,7 +100,7 @@ _Calling a lambda function_
 # spq
 values lambda x:x+1 (2)
 # input
-null
+
 # expected output
 3
 ```
@@ -113,7 +113,7 @@ _Passing a lambda function_
 fn square(g,val):g(val)*g(val)
 values square(lambda x:x+1, 2)
 # input
-null
+
 # expected output
 9
 ```
@@ -150,7 +150,7 @@ _Function references may not be assigned to super-structured values_
 fn f():null
 values {x:&f}
 # input
-null
+
 # expected output
 parse error at line 2, column 11:
 values {x:&f}

book/src/super-sql/expressions/inputs.md

@@ -120,7 +120,7 @@ let input = (
 )
 SELECT x FROM input
 # input
-null
+
 # expected output
 {x:1}
 {x:2}