Misaligned help entries

Descriptions for `build` subcommand aligned.
hashicorp/packer#6652

command/build.go

@@ -294,16 +294,16 @@ Usage: packer build [options] TEMPLATE
 
 Options:
 
-  -color=false               Disable color output (on by default)
-  -debug                     Debug mode enabled for builds
-  -except=foo,bar,baz        Build all builds other than these
-  -only=foo,bar,baz          Build only the specified builds
-  -force                     Force a build to continue if artifacts exist, deletes existing artifacts
-  -machine-readable          Machine-readable output
+  -color=false                  Disable color output (on by default)
+  -debug                        Debug mode enabled for builds
+  -except=foo,bar,baz           Build all builds other than these
+  -only=foo,bar,baz             Build only the specified builds
+  -force                        Force a build to continue if artifacts exist, deletes existing artifacts
+  -machine-readable             Machine-readable output
   -on-error=[cleanup|abort|ask] If the build fails do: clean up (default), abort, or ask
-  -parallel=false            Disable parallelization (on by default)
-  -var 'key=value'           Variable for templates, can be used multiple times.
-  -var-file=path             JSON file containing user variables.
+  -parallel=false               Disable parallelization (on by default)
+  -var 'key=value'              Variable for templates, can be used multiple times.
+  -var-file=path                JSON file containing user variables.
 `
 
 	return strings.TrimSpace(helpText)