[DOCS] Fix QN Index docs regarding dir keyword argument (#1615)

Author: mtfishman

Project.toml

@@ -1,7 +1,7 @@
 name = "ITensors"
 uuid = "9136182c-28ba-11e9-034c-db9fb085ebd5"
 authors = ["Matthew Fishman <[email protected]>", "Miles Stoudenmire <[email protected]>"]
-version = "0.8.1"
+version = "0.8.2"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"

src/qn/qnindex.jl

@@ -139,25 +139,24 @@ function Index(qnblocks::QNBlocks; dir::Arrow=Out, tags="", plev=0)
 end
 
 """
-    Index(qnblocks::Vector{Pair{QN, Int64}}, tags; dir::Arrow = Out,
-                                                   plev::Integer = 0)
+    Index(qnblocks::Vector{Pair{QN, Int64}}, tags; plev::Integer = 0)
 
 Construct a QN Index from a Vector of pairs of QN and block
 dimensions.
 
 # Example
 
 ```
-Index([QN("Sz", -1) => 1, QN("Sz", 1) => 1], "i"; dir = In)
+i = Index([QN("Sz", -1) => 1, QN("Sz", 1) => 1], "i")
+idag = dag(i) # Same Index with arrow direction flipped
 ```
 """
 function Index(qnblocks::QNBlocks, tags; dir::Arrow=Out, plev::Integer=0)
   return Index(qnblocks; dir=dir, tags=tags, plev=plev)
 end
 
 """
-    Index(qnblocks::Pair{QN, Int64}...; dir::Arrow = Out,
-                                        tags = "",
+    Index(qnblocks::Pair{QN, Int64}...; tags = "",
                                         plev::Integer = 0)
 
 Construct a QN Index from a list of pairs of QN and block