Ensure Go code is formatted (#37)

.github/workflows/push.yml

@@ -48,3 +48,24 @@ jobs:
 
       - name: Run tests
         run: make test
+
+  fmt:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-go@v1
+        with:
+          go-version: 1.18.x
+
+      - name: Run gofmt
+        run: |
+          # -l: list files that were reformatted
+          # -w: write back formatted files to disk
+          gofmt -l -w ./
+
+      - name: Fail on differences
+        run: |
+          # Exit with status code 1 if there are differences (i.e. unformatted files)
+          git diff --exit-code

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "[go]": {
+        "editor.insertSpaces": false,
+        "editor.formatOnSave": true
+    }
+}

terraform/runner.go

@@ -10,13 +10,14 @@ Solve the following adoption slowers:
 - users won't have to copy-paste these into their configs:
 
 ```hcl
-terraform {
+
+	terraform {
 	  required_providers {
 	    databricks = {
 	      source  = "databrickslabs/databricks"
 	    }
 	  }
-}
+	}
 
 provider "databricks" {
 }
@@ -25,11 +26,11 @@ provider "databricks" {
 Terraform Plugin SDK v2 is using similar techniques for testing providers. One may find
 details in github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource/plugin.go. In short:
 
-- init provider isntance
-- start terraform plugin GRPC server
-- "reattach" providers and specify the `tfexec.Reattach` options, which essentially
+  - init provider isntance
+  - start terraform plugin GRPC server
+  - "reattach" providers and specify the `tfexec.Reattach` options, which essentially
     forward GRPC address to terraform subprocess.
-- this can be done by either adding a source depenency on Databricks provider
+  - this can be done by either adding a source depenency on Databricks provider
     or adding a special launch mode to it.
 
 For now