[Website] The installation command failed on Windows10 anaconda environment.

[asfimport]

In https://arrow.apache.org/install/ , this command is failed my environment.
conda install pyarrow==0.7.* -c conda-forge

Output:

PackageNotFoundError: Packages missing in current channels:

  - pyarrow ==0.7.*

We have searched for the packages in the following channels:

  - https://conda.anaconda.org/conda-forge/win-64
  - https://conda.anaconda.org/conda-forge/noarch
  - https://repo.continuum.io/pkgs/main/win-64
  - https://repo.continuum.io/pkgs/main/noarch
  - https://repo.continuum.io/pkgs/free/win-64
  - https://repo.continuum.io/pkgs/free/noarch
  - https://repo.continuum.io/pkgs/r/win-64
  - https://repo.continuum.io/pkgs/r/noarch
  - https://repo.continuum.io/pkgs/pro/win-64
  - https://repo.continuum.io/pkgs/pro/noarch
  - https://repo.continuum.io/pkgs/msys2/win-64
  - https://repo.continuum.io/pkgs/msys2/noarch

If I input the follwing command, the installation is succeded.
conda install pyarrow=0.7.* -c conda-forge

The difference between them is "==" and "=".

Environment: Windows10 and Anaconda
Reporter: Kazuhiro Sodebayashi

PRs and other links:

• GitHub Pull Request #1342

_{Note: This issue was originally created as ARROW-1840. Please see the migration documentation for further details.}

[asfimport]

Kazuhiro Sodebayashi:
I will make pullrequest myself.

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 1342
#1342