Fix typos in comments

lib/system/alloc.nim

@@ -210,7 +210,7 @@ proc getMaxMem(a: var MemRegion): int =
 
 proc llAlloc(a: var MemRegion, size: int): pointer =
   # *low-level* alloc for the memory managers data structures. Deallocation
-  # is done at he end of the allocator's life time.
+  # is done at the end of the allocator's life time.
   if a.llmem == nil or size > a.llmem.size:
     # the requested size is ``roundup(size+sizeof(LLChunk), PageSize)``, but
     # since we know ``size`` is a (small) constant, we know the requested size

lib/system/hti.nim

@@ -7,14 +7,14 @@
 #    distribution, for details about the copyright.
 #
 
-when declared(NimString): 
+when declared(NimString):
   # we are in system module:
   {.pragma: codegenType, compilerproc.}
 else:
   {.pragma: codegenType, importc.}
 
-type 
-  # This should be he same as ast.TTypeKind
+type
+  # This should be the same as ast.TTypeKind
   # many enum fields are not used at runtime
   TNimKind = enum
     tyNone,
@@ -73,7 +73,7 @@ type
     len: int
     sons: ptr array [0..0x7fff, ptr TNimNode]
 
-  TNimTypeFlag = enum 
+  TNimTypeFlag = enum
     ntfNoRefs = 0,     # type contains no tyRef, tySequence, tyString
     ntfAcyclic = 1,    # type cannot form a cycle
     ntfEnumHole = 2    # enum has holes and thus `$` for them needs the slow
@@ -88,5 +88,5 @@ type
     marker: proc (p: pointer, op: int) {.nimcall, benign.} # marker proc for GC
     deepcopy: proc (p: pointer): pointer {.nimcall, benign.}
   PNimType = ptr TNimType
-  
+
 # node.len may be the ``first`` element of a set