style usages part one (openarray => openArray) (#19321)

* style usages (openArray)

* revert doc changes

tests/errmsgs/t17460.nim

@@ -3,7 +3,7 @@ discard """
   errormsg: "wrong number of variables"
 """
 
-iterator xclusters*[T](a: openarray[T]; s: static[int]): array[s, T] {.inline.} =
+iterator xclusters*[T](a: openArray[T]; s: static[int]): array[s, T] {.inline.} =
   var result: array[s, T] # iterators have no default result variable
   var i = 0
   while i < len(a):

tests/errmsgs/tproper_stacktrace.nim

@@ -6,7 +6,7 @@ import strscans, strutils
 proc raiseTestException*() =
   raise newException(Exception, "test")
 
-proc matchStackTrace(actualEntries: openarray[StackTraceEntry], expected: string) =
+proc matchStackTrace(actualEntries: openArray[StackTraceEntry], expected: string) =
   var expectedEntries = newSeq[StackTraceEntry]()
   var i = 0
 

tests/errmsgs/tsigmatch.nim

@@ -132,12 +132,12 @@ block:
   echo foo(fun)
 
 block:
-  # bug #10285 Function signature don't match when inside seq/array/openarray
+  # bug #10285 Function signature don't match when inside seq/array/openArray
   # Note: the error message now shows `closure` which helps debugging the issue
   # out why it doesn't match
   proc takesFunc(f: proc (x: int) {.gcsafe, locks: 0.}) =
     echo "takes single Func"
-  proc takesFuncs(fs: openarray[proc (x: int) {.gcsafe, locks: 0.}]) =
+  proc takesFuncs(fs: openArray[proc (x: int) {.gcsafe, locks: 0.}]) =
     echo "takes multiple Func"
   takesFunc(proc (x: int) {.gcsafe, locks: 0.} = echo x)         # works
   takesFuncs([proc (x: int) {.gcsafe, locks: 0.} = echo x])      # fails