Update .editorconfig (#969)

This makes a couple of corrections to `.editorconfig` and reformats the
comments at the top to be less superflous and more in line with the
style in other TFQ files.

* Add a missing entry for Bazel `WORKSPACE` files
* Correct the indentation for shell scripts to be 2 instead of 4 (so
that it matches what TensorFlow uses
* Add missing curly braces in the entry for YAML files

Author: mhucka

.editorconfig

@@ -11,22 +11,15 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-# Common editor configurations for this project.
-#
-# EditorConfig is a file format for specifying some common style parameters.
-# Many IDEs & editors read .editorconfig files, either natively or via plugins.
-# We mostly follow Google's style guides (https://google.github.io/styleguide/)
-# with only a few deviations for line length and indentation in some files.
-# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+# ============================================================================
 
 root = true
 
-# IMPORTANT: some of the other config files (.markdownlintrc, .jsonlintrc.yaml,
-# etc.) also have settings for indent and line length. When making changes to
-# this file, make sure to update the other files to match.
+# We follow the TensorFlow coding style
+# https://www.tensorflow.org/community/contribute/code_style
 
+# IMPORTANT: some of the other config files (.clang-format, etc.) also have
+# the same settings and need to be updated if changes are made to this file.
 [*]
 charset = utf-8
 indent_style = space
@@ -35,7 +28,7 @@ spelling_language = en-US
 trim_trailing_whitespace = true
 max_line_length = 80
 
-[{BUILD,*.BUILD,*.bzl,*.bazel,.bazelrc}]
+[{BUILD,*.BUILD,*.bzl,*.bazel,.bazelrc,WORKSPACE}]
 indent_size = 4
 
 [{*.cc,*.h}]
@@ -48,7 +41,7 @@ indent_size = 2
 indent_size = 4
 
 [*.sh]
-indent_size = 4
+indent_size = 2
 
-[*.yml,*.yaml]
+[{*.yml,*.yaml}]
 indent_size = 2