Merge branch 'devel' of github.com:nim-lang/Nim into devel

compiler/installer.ini

@@ -104,6 +104,7 @@ Files: "lib/pure/concurrency/*.cfg"
 Files: "lib/impure/*.nim"
 Files: "lib/impure/nre/private/*.nim"
 Files: "lib/wrappers/*.nim"
+Files: "lib/arch/*.nim"
 
 Files: "lib/wrappers/readline/*.nim"
 Files: "lib/wrappers/linenoise/*.nim"

compiler/semmagic.nim

@@ -178,10 +178,6 @@ proc magicsAfterOverloadResolution(c: PContext, n: PNode,
     result.typ = n[1].typ
   of mDotDot:
     result = n
-    # disallow negative indexing for now:
-    if not c.p.bracketExpr.isNil:
-      if isNegative(n.sons[1]) or (n.len > 2 and isNegative(n.sons[2])):
-        localError(n.info, "use '^' instead of '-'; negative indexing is obsolete")
   of mRoof:
     let bracketExpr = if n.len == 3: n.sons[2] else: c.p.bracketExpr
     if bracketExpr.isNil:

compiler/semtypinst.nim

@@ -60,7 +60,7 @@ proc searchInstTypes*(key: PType): PType =
     if inst.id == key.id: return inst
     if inst.sons.len < key.sons.len:
       # XXX: This happens for prematurely cached
-      # types such as TChannel[empty]. Why?
+      # types such as Channel[empty]. Why?
       # See the notes for PActor in handleGenericInvocation
       return
     block matchType: