Merge tests into a larger file (part 3 of ∞: generics) (#9347)

* merge generics issues tests
* merge tgeneric
* merge test with local imports
* merge tcan tests
* merge matcher tests
* more issue tests merged
* one more tcan test
* merge various small tests into one file
* add a test for #3717

tests/generics/tgenericmatcher.nim

@@ -1,22 +1,40 @@
 discard """
-  disabled: false
+  output: '''
+'''
 """
 
-type
-  TMatcherKind = enum
-    mkTerminal, mkSequence, mkAlternation, mkRepeat
-  TMatcher[T] = object
-    case kind: TMatcherKind
-    of mkTerminal:
-      value: T
-    of mkSequence, mkAlternation:
-      matchers: seq[TMatcher[T]]
-    of mkRepeat:
-      matcher: PMatcher[T]
-      min, max: int
-  PMatcher[T] = ref TMatcher[T]
 
-var
-  m: PMatcher[int]
+block tmatcher1:
+  type
+    TMatcherKind = enum
+      mkTerminal, mkSequence, mkAlternation, mkRepeat
+    TMatcher[T] = object
+      case kind: TMatcherKind
+      of mkTerminal:
+        value: T
+      of mkSequence, mkAlternation:
+        matchers: seq[TMatcher[T]]
+      of mkRepeat:
+        matcher: PMatcher[T]
+        min, max: int
+    PMatcher[T] = ref TMatcher[T]
+
+  var m: PMatcher[int]
 
 
+block tmatcher2:
+  type
+    TMatcherKind = enum
+      mkTerminal, mkSequence, mkAlternation, mkRepeat
+    TMatcher[T] = object
+      case kind: TMatcherKind
+      of mkTerminal:
+        value: T
+      of mkSequence, mkAlternation:
+        matchers: seq[TMatcher[T]]
+      of mkRepeat:
+        matcher: ref TMatcher[T]
+        min, max: int
+  
+  var m: ref TMatcher[int]
+