Indent block collection characters to comply with spec

[homebysix]

As mentioned in #859, PyYAML does not indent - (and other block collection indicators) according to the YAML indentation spec.

This is a cosmetic difference, and some disagree that the indentation is counter to the spec, but the fix is simple enough and may improve compatibility with certain YAML parsers.

Test output forthcoming.

[homebysix]

Test output

Three verbs can produce yaml recipes: new-recipe, make-override, and update-trust-info.

new-recipe

Before (dev branch):

% ./Code/autopkg new-recipe /tmp/newrecipe.check.recipe.yaml --format=yaml
Saved new recipe to /tmp/newrecipe.check.recipe.yaml

% cat /tmp/newrecipe.check.recipe.yaml
Description: Recipe description
Identifier: local.newrecipe
Input:
  NAME: newrecipe
MinimumVersion: '2.3'
Process:
- Arguments:
    Argument1: Value1
    Argument2: Value2
  Processor: ProcessorName

After:

% rm /tmp/newrecipe.check.recipe.yaml

% ./Code/autopkg new-recipe /tmp/newrecipe.check.recipe.yaml --format=yaml
Saved new recipe to /tmp/newrecipe.check.recipe.yaml

% cat /tmp/newrecipe.check.recipe.yaml
Description: Recipe description
Identifier: local.newrecipe
Input:
  NAME: newrecipe
MinimumVersion: '2.3'
Process:
  - Arguments:
      Argument1: Value1
      Argument2: Value2
    Processor: ProcessorName

make-override

Before (dev branch):

% ./Code/autopkg make-override coconutBattery.munki --format=yaml
Override file saved to ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml

% cat ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml
Identifier: local.munki.coconutBattery
Input:
  MUNKI_REPO_SUBDIR: apps/%NAME%
  NAME: coconutBattery
  pkginfo:
    catalogs:
    - testing
    description: Displays info about your laptop battery.
    developer: Christoph Sinai
    display_name: coconutBattery
    name: '%NAME%'
    unattended_install: true
ParentRecipe: com.github.homebysix.munki.coconutBattery
ParentRecipeTrustInfo:
  non_core_processors: {}
  parent_recipes:
    com.github.homebysix.download.coconutBattery:
      git_hash: 9b0234d95b80ae32897d954ef507d569599a6918
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.download.recipe
      sha256_hash: 54aa4af7cf13ea1de224bc6a103adec2f23d58ba01e22a93f1afda853b284dc7
    com.github.homebysix.munki.coconutBattery:
      git_hash: ce2e59330b7039cefcab2975af9fc2b47334305d
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.munki.recipe
      sha256_hash: 1edc338e95235e1a5a6b5d468b33abc97ec85adc65ef8192a31a6e48d5402116

After:

% rm ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml

% ./Code/autopkg make-override coconutBattery.munki --format=yaml
Override file saved to ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml

% cat ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml
Identifier: local.munki.coconutBattery
Input:
  MUNKI_REPO_SUBDIR: apps/%NAME%
  NAME: coconutBattery
  pkginfo:
    catalogs:
      - testing
    description: Displays info about your laptop battery.
    developer: Christoph Sinai
    display_name: coconutBattery
    name: '%NAME%'
    unattended_install: true
ParentRecipe: com.github.homebysix.munki.coconutBattery
ParentRecipeTrustInfo:
  non_core_processors: {}
  parent_recipes:
    com.github.homebysix.download.coconutBattery:
      git_hash: 9b0234d95b80ae32897d954ef507d569599a6918
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.download.recipe
      sha256_hash: 54aa4af7cf13ea1de224bc6a103adec2f23d58ba01e22a93f1afda853b284dc7
    com.github.homebysix.munki.coconutBattery:
      git_hash: ce2e59330b7039cefcab2975af9fc2b47334305d
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.munki.recipe
      sha256_hash: 1edc338e95235e1a5a6b5d468b33abc97ec85adc65ef8192a31a6e48d5402116

update-trust-info

Before (dev branch):

% ./Code/autopkg update-trust-info coconutBattery.munki
Wrote updated ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml

% cat ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml
Identifier: local.munki.coconutBattery
Input:
  MUNKI_REPO_SUBDIR: apps/%NAME%
  NAME: coconutBattery
  pkginfo:
    catalogs:
    - testing
    description: Displays info about your laptop battery.
    developer: Christoph Sinai
    display_name: coconutBattery
    name: '%NAME%'
    unattended_install: true
ParentRecipe: com.github.homebysix.munki.coconutBattery
ParentRecipeTrustInfo:
  non_core_processors: {}
  parent_recipes:
    com.github.homebysix.download.coconutBattery:
      git_hash: 9b0234d95b80ae32897d954ef507d569599a6918
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.download.recipe
      sha256_hash: 54aa4af7cf13ea1de224bc6a103adec2f23d58ba01e22a93f1afda853b284dc7
    com.github.homebysix.munki.coconutBattery:
      git_hash: ce2e59330b7039cefcab2975af9fc2b47334305d
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.munki.recipe
      sha256_hash: 1edc338e95235e1a5a6b5d468b33abc97ec85adc65ef8192a31a6e48d5402116

After:

% ./Code/autopkg update-trust-info coconutBattery.munki
Wrote updated ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml

% cat ~/Library/AutoPkg/RecipeOverrides/coconutBattery.munki.recipe.yaml
Identifier: local.munki.coconutBattery
Input:
  MUNKI_REPO_SUBDIR: apps/%NAME%
  NAME: coconutBattery
  pkginfo:
    catalogs:
      - testing
    description: Displays info about your laptop battery.
    developer: Christoph Sinai
    display_name: coconutBattery
    name: '%NAME%'
    unattended_install: true
ParentRecipe: com.github.homebysix.munki.coconutBattery
ParentRecipeTrustInfo:
  non_core_processors: {}
  parent_recipes:
    com.github.homebysix.download.coconutBattery:
      git_hash: 9b0234d95b80ae32897d954ef507d569599a6918
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.download.recipe
      sha256_hash: 54aa4af7cf13ea1de224bc6a103adec2f23d58ba01e22a93f1afda853b284dc7
    com.github.homebysix.munki.coconutBattery:
      git_hash: ce2e59330b7039cefcab2975af9fc2b47334305d
      path: ~/Library/AutoPkg/RecipeRepos/com.github.autopkg.homebysix-recipes/coconutBattery/coconutBattery.munki.recipe
      sha256_hash: 1edc338e95235e1a5a6b5d468b33abc97ec85adc65ef8192a31a6e48d5402116