Add appengine/gcloud/mustache dependencies.

pkg/mustache/test/spec/partials.yml

+overview: |
+  Partial tags are used to expand an external template into the current
+  template.
+
+  The tag's content MUST be a non-whitespace character sequence NOT containing
+  the current closing delimiter.
+
+  This tag's content names the partial to inject.  Set Delimiter tags MUST NOT
+  affect the parsing of a partial.  The partial MUST be rendered against the
+  context stack local to the tag.  If the named partial cannot be found, the
+  empty string SHOULD be used instead, as in interpolations.
+
+  Partial tags SHOULD be treated as standalone when appropriate.  If this tag
+  is used standalone, any whitespace preceding the tag should treated as
+  indentation, and prepended to each line of the partial before rendering.
+tests:
+  - name: Basic Behavior
+    desc: The greater-than operator should expand to the named partial.
+    data: { }
+    template: '"{{>text}}"'
+    partials: { text: 'from partial' }
+    expected: '"from partial"'
+
+  - name: Failed Lookup
+    desc: The empty string should be used when the named partial is not found.
+    data: { }
+    template: '"{{>text}}"'
+    partials: { }
+    expected: '""'
+
+  - name: Context
+    desc: The greater-than operator should operate within the current context.
+    data: { text: 'content' }
+    template: '"{{>partial}}"'
+    partials: { partial: '*{{text}}*' }
+    expected: '"*content*"'
+
+  - name: Recursion
+    desc: The greater-than operator should properly recurse.
+    data: { content: "X", nodes: [ { content: "Y", nodes: [] } ] }
+    template: '{{>node}}'
+    partials: { node: '{{content}}<{{#nodes}}{{>node}}{{/nodes}}>' }
+    expected: 'X<Y<>>'
+
+  # Whitespace Sensitivity
+
+  - name: Surrounding Whitespace
+    desc: The greater-than operator should not alter surrounding whitespace.
+    data: { }
+    template: '| {{>partial}} |'
+    partials: { partial: "\t|\t" }
+    expected: "| \t|\t |"
+
+  - name: Inline Indentation
+    desc: Whitespace should be left untouched.
+    data: { data: '|' }
+    template: "  {{data}}  {{> partial}}\n"
+    partials: { partial: ">\n>" }
+    expected: "  |  >\n>\n"
+
+  - name: Standalone Line Endings
+    desc: '"\r\n" should be considered a newline for standalone tags.'
+    data: { }
+    template: "|\r\n{{>partial}}\r\n|"
+    partials: { partial: ">" }
+    expected: "|\r\n>|"
+
+  - name: Standalone Without Previous Line
+    desc: Standalone tags should not require a newline to precede them.
+    data: { }
+    template: "  {{>partial}}\n>"
+    partials: { partial: ">\n>"}
+    expected: "  >\n  >>"
+
+  - name: Standalone Without Newline
+    desc: Standalone tags should not require a newline to follow them.
+    data: { }
+    template: ">\n  {{>partial}}"
+    partials: { partial: ">\n>" }
+    expected: ">\n  >\n  >"
+
+  - name: Standalone Indentation
+    desc: Each line of the partial should be indented before rendering.
+    data: { content: "<\n->" }
+    template: |
+      \
+       {{>partial}}
+      /
+    partials:
+      partial: |
+        |
+        {{{content}}}
+        |
+    expected: |
+      \
+       |
+       <
+      ->
+       |
+      /
+
+  # Whitespace Insensitivity
+
+  - name: Padding Whitespace
+    desc: Superfluous in-tag whitespace should be ignored.
+    data: { boolean: true }
+    template: "|{{> partial }}|"
+    partials: { partial: "[]" }
+    expected: '|[]|'