Small comment fixes

IPython/nbconvert/templates/skeleton/null.tpl

@@ -1,60 +1,60 b''
 {#
 
-DO NOT USE THIS AS A BASE WORK,
+DO NOT USE THIS AS A BASE,
 IF YOU ARE COPY AND PASTING THIS FILE
-YOU ARE PROBABLY DOING THINGS WRONG.
+YOU ARE PROBABLY DOING THINGS INCORRECTLY.
 
-Null template, Does nothing except defining a basic structure
+Null template, does nothing except defining a basic structure
 To layout the different blocks of a notebook.
 
 Subtemplates can override blocks to define their custom representation.
 
 If one of the block you do overwrite is not a leave block, consider
 calling super.
 
 {%- block nonLeaveBlock -%}
     #add stuff at beginning
     {{ super() }}
     #add stuff at end
 {%- endblock nonLeaveBlock -%}
 
 consider calling super even if it is a leave block, we might insert more blocks later.
 
 #}
 {%- block header -%}
 {%- endblock header -%}
 {%- block body -%}
 {%- for worksheet in nb.worksheets -%}
     {%- for cell in worksheet.cells -%}
         {%- block any_cell scoped -%}
             {%- if cell.cell_type in ['code'] -%}
                 {%- block codecell scoped -%}
                     {%- block input_group -%}
                         {%- include 'cell_input.tpl' -%}
                     {%- endblock input_group -%}
                     {%- if cell.outputs -%}
                     {%- block output_group -%}
                         {%- include 'cell_outputs.tpl' -%}
                     {%- endblock output_group -%}
                     {%- endif -%}
                 {%- endblock codecell -%}
             {%- elif cell.cell_type in ['markdown'] -%}
                 {%- block markdowncell scoped-%}
                 {%- endblock markdowncell -%}
             {%- elif cell.cell_type in ['heading'] -%}
                 {%- block headingcell scoped-%}
                 {%- endblock headingcell -%}
             {%- elif cell.cell_type in ['raw'] -%}
                 {%- block rawcell scoped-%}
                 {%- endblock rawcell -%}
             {%- else -%}
                 {%- block unknowncell scoped-%}
                 {%- endblock unknowncell -%}
             {%- endif -%}
         {%- endblock any_cell -%}
     {%- endfor -%}
 {%- endfor -%}
 {%- endblock body -%}
 
 {%- block footer -%}
 {%- endblock footer -%}