megatest: make it green on Linux

tests/generics/tgenerics_issues.nim

@@ -24,12 +24,11 @@ G:0,1:0.1
 G:0,1:0.1
 H:1:0.1
 '''
+joinable: false
 """
 
-
 import macros, sequtils, sets, sugar, tables, typetraits
 
-
 block t88:
   type
     BaseClass[V] = object of RootObj

tests/generics/tgenerics_various.nim

@@ -5,12 +5,11 @@ direct
 generic
 generic
 '''
+joinable: false
 """
 
-
 import algorithm, sugar, sequtils, typetraits, asyncdispatch
 
-
 block tconfusing_arrow:
   type Deck = object
     value: int

tests/generics/tparser_generator.nim

@@ -1,6 +1,7 @@
 discard """
   output: '''Match failed: spam
 Match failed: ham'''
+joinable: false
 """
 
 # bug #6220

tests/lexer/tstrlits.nim

@@ -16,5 +16,4 @@ const
 stdout.write(rawQuote)
 stdout.write(tripleEmpty)
 stdout.write(raw)
-stdout.write(escaped)
-#OUT a""long string"""""abc"def_'2'●𝌆𝌆A
+stdout.writeLine(escaped)

tests/macros/tsametype.nim

@@ -9,6 +9,7 @@ true
 false
 true
 false'''
+joinable: false
 """
 
 import macros

tests/magics/tmagics.nim

@@ -8,20 +8,21 @@ true
 false
 true
 '''
+joinable: false
 """
 
 block tlowhigh:
   type myEnum = enum e1, e2, e3, e4, e5
   var a: array[myEnum, int]
-  
+
   for i in low(a) .. high(a):
     a[i] = 0
-  
+
   proc sum(a: openarray[int]): int =
     result = 0
     for i in low(a)..high(a):
       inc(result, a[i])
-  
+
   doAssert sum([1, 2, 3, 4]) == 10