More descriptive names of test files (#9531)

* change generic `tissues` name to more specific
* change `tvarious` to more specific names

tests/closure/tclosure_issues.nim

@@ -0,0 +1,54 @@
+discard """
+  output: '''true'''
+"""
+
+
+block tissue600:
+  for i in 1..1:
+    var reported = false
+    proc report() =
+      reported = true
+
+
+
+import sequtils
+block tissue1502def:
+  let xs: seq[tuple[key: string, val: seq[string]]] = @[("foo", @["bar"])]
+
+  let maps = xs.map(
+    proc(x: auto): tuple[typ: string, maps: seq[string]] =
+      (x.key, x.val.map(proc(x: string): string = x)))
+
+
+
+block tissue1642:
+  var i = 0
+  proc p() = inc(i)
+
+
+
+block tissue1846:
+  type
+    TBinOp[T] = proc (x,y: T): bool
+    THeap[T] = object
+      cmp: TBinOp[T]
+
+  proc less[T](x,y: T): bool =
+    x < y
+
+  proc initHeap[T](cmp: TBinOp[T]): THeap[T] =
+    result.cmp = cmp
+
+  var h = initHeap[int](less[int])
+  echo h.cmp(2,3)
+
+
+
+block tissue1911:
+  proc foo(x: int) : auto =
+
+    proc helper() : int = x
+    proc bar() : int = helper()
+    proc baz() : int = helper()
+
+    return (bar, baz)