command: Consistency implement and document parallelism default of 10

References:
* f4da82a023/command/command.go (L41)
* b9d8e96e0c/terraform/context.go (L149-L155)

command/import.go

@@ -38,7 +38,7 @@ func (c *ImportCommand) Run(args []string) int {
 	}
 
 	cmdFlags := c.Meta.extendedFlagSet("import")
-	cmdFlags.IntVar(&c.Meta.parallelism, "parallelism", 0, "parallelism")
+	cmdFlags.IntVar(&c.Meta.parallelism, "parallelism", DefaultParallelism, "parallelism")
 	cmdFlags.StringVar(&c.Meta.statePath, "state", "", "path")
 	cmdFlags.StringVar(&c.Meta.stateOutPath, "state-out", "", "path")
 	cmdFlags.StringVar(&c.Meta.backupPath, "backup", "", "path")

command/refresh.go

@@ -23,7 +23,7 @@ func (c *RefreshCommand) Run(args []string) int {
 
 	cmdFlags := c.Meta.extendedFlagSet("refresh")
 	cmdFlags.StringVar(&c.Meta.statePath, "state", DefaultStateFilename, "path")
-	cmdFlags.IntVar(&c.Meta.parallelism, "parallelism", 0, "parallelism")
+	cmdFlags.IntVar(&c.Meta.parallelism, "parallelism", DefaultParallelism, "parallelism")
 	cmdFlags.StringVar(&c.Meta.stateOutPath, "state-out", "", "path")
 	cmdFlags.StringVar(&c.Meta.backupPath, "backup", "", "path")
 	cmdFlags.BoolVar(&c.Meta.stateLock, "lock", true, "lock state")

website/docs/commands/apply.html.markdown

@@ -38,7 +38,8 @@ The command-line flags are all optional. The list of available flags are:
 * `-no-color` - Disables output with coloring.
 
 * `-parallelism=n` - Limit the number of concurrent operation as Terraform
-  [walks the graph](/docs/internals/graph.html#walking-the-graph).
+  [walks the graph](/docs/internals/graph.html#walking-the-graph). Defaults to
+  10.
 
 * `-refresh=true` - Update the state for each resource prior to planning
   and applying. This has no effect if a plan file is given directly to

website/docs/commands/import.html.md

@@ -48,6 +48,10 @@ The command-line flags are all optional. The list of available flags are:
 
 * `-no-color` - If specified, output won't contain any color.
 
+* `-parallelism=n` - Limit the number of concurrent operation as Terraform
+  [walks the graph](/docs/internals/graph.html#walking-the-graph). Defaults
+  to 10.
+
 * `-provider=provider` - Specified provider to use for import. The value should be a provider
   alias in the form `TYPE.ALIAS`, such as "aws.eu". This defaults to the normal
   provider based on the prefix of the resource being imported. You usually

website/docs/commands/plan.html.markdown

@@ -60,7 +60,8 @@ The command-line flags are all optional. The list of available flags are:
   plans below.
 
 * `-parallelism=n` - Limit the number of concurrent operation as Terraform
-  [walks the graph](/docs/internals/graph.html#walking-the-graph).
+  [walks the graph](/docs/internals/graph.html#walking-the-graph). Defaults
+  to 10.
 
 * `-refresh=true` - Update the state prior to checking for differences.
 

website/docs/commands/refresh.html.markdown

@@ -37,6 +37,10 @@ The command-line flags are all optional. The list of available flags are:
 
 * `-no-color` - If specified, output won't contain any color.
 
+* `-parallelism=n` - Limit the number of concurrent operation as Terraform
+  [walks the graph](/docs/internals/graph.html#walking-the-graph). Defaults
+  to 10.
+
 * `-state=path` - Path to read and write the state file to. Defaults to "terraform.tfstate".
   Ignored when [remote state](/docs/state/remote.html) is used.