Fix docs for Problem::EvaluateOptions and contributing

Fix Problem::EvaluateOptions::residual_blocks description
Fix gerrit interface description in contributing instructions

Change-Id: I3347f35a85700a9f8ae1da3b79a6292a9d4dffe0

docs/source/contributing.rst

diff --git a/docs/source/contributing.rst b/docs/source/contributing.rst
index f78c37a..cedac9b 100644
--- a/docs/source/contributing.rst
+++ b/docs/source/contributing.rst
@@ -72,7 +72,7 @@
    * Sign into `http://ceres-solver-review.googlesource.com
      <http://ceres-solver-review.googlesource.com>`_.
 
-   * Click ``Settings -> HTTP Password -> Obtain Password``.
+   * Click ``Settings -> HTTP Credentials -> Obtain Password``.
 
    * (maybe) Select an account for multi-login. This should be the
      same as your Gerrit login.

docs/source/nnls_modeling.rst

diff --git a/docs/source/nnls_modeling.rst b/docs/source/nnls_modeling.rst
index f451b48..860b689 100644
--- a/docs/source/nnls_modeling.rst
+++ b/docs/source/nnls_modeling.rst
@@ -1825,7 +1825,7 @@
    performed. This vector determines the order in which the residuals
    occur, and how the rows of the jacobian are ordered. If
    residual_blocks is empty, then it is assumed to be equal to the
-   vector containing all the parameter blocks.
+   vector containing all the residual blocks.
 
 .. member:: bool Problem::EvaluateOptions::apply_loss_function