removed the undocumented #? strongSpaces parsing mode

tests/parser/tstrongspaces.nim

@@ -1,83 +0,0 @@
-#? strongSpaces
-
-discard """
-  output: '''35
-true
-true
-4
-true
-1
-false
-77
-(Field0: 1, Field1: 2, Field2: 2)
-ha
-true
-tester args
-all
-all args
-19
--3
-false
--2
-'''
-"""
-
-echo 2+5 * 5
-
-# Keyword operators
-echo 1 + 16 shl 1 == 1 + (16 shl 1)
-echo 2 and 1  in  {0, 30}
-echo 2+2 * 2 shr 1
-echo false  or  2 and 1  in  {0, 30}
-
-proc `^`(a, b: int): int = a + b div 2
-echo 19 mod 16 ^ 4  +  2 and 1
-echo 18 mod 16 ^ 4 > 0
-
-# echo $foo gotcha
-let foo = 77
-echo $foo
-
-echo (1, 2, 2)
-
-template `&`(a, b: int): int = a and b
-template `|`(a, b: int): int = a - b
-template `++`(a, b: int): bool = a + b == 8009
-
-when true:
-  let b = 66
-  let c = 90
-  let bar = 8000
-  if foo+4 * 4 == 8  and  b&c | 9  ++
-      bar:
-    echo "ho"
-  else:
-    echo "ha"
-
-  let booA = foo+4 * 4  -  b&c | 9  +
-      bar
-  # is parsed as
-  let booB = ((foo+4)*4) - ((b&c) | 9) + bar
-
-  echo booA == booB
-
-
-template `|`(a, b): untyped = (if a.len > 0: a else: b)
-
-const
-  tester = "tester"
-  args = "args"
-
-echo tester & " " & args|"all"
-echo "all"  |  tester & " " & args
-echo "all"|tester & " " & args
-
-# Test arrow like operators. See also tests/macros/tclosuremacro.nim
-proc `+->`(a, b: int): int = a + b*4
-template `===>`(a, b: int): int = a - b shr 1
-
-echo 3 +-> 2 + 2 and 4
-var arrowed = 3+->2 + 2 and 4  # arrowed = 4
-echo arrowed ===> 15
-echo (2 * 3+->2) == (2*3 +-> 2)
-echo arrowed ===> 2 + 3+->2