auto-correct option

[ryanmerolle]

Several linters offer auto-correct options. It would make sense to offer this function given a lot of the style lint is related to easily fixable, but tedious fixes.

[ryanmerolle]

Auto-correction could be applied as such:

Rule Code	Rule	Auto-Correction
S0	Jinja syntax should be correct	N/A - Hard to do given you may not know where to end a conditional or for loop
S1	A single space shall be added between Jinja2 curly brackets and a variable’s name: {{ ethernet_interface }}	replace with single space
S2	When variables are used in combination with an operator, the operator shall be enclosed by space	replace with single space
S3	All J2 statements must be indented by 4 more spaces within jinja delimiter. To close a control, end tag must have same indentation level.	correct indentiation
S4	Jinja statement should have a single space before and after: {% statement %}	replace with single space
S5	Indentation are 4 spaces and NOT tabulation	correct indentiation
S6	Jinja statements should not have {%- or {%+ or -%} as delimeters	remove + and -
S7	Jinja statements should be on separate lines	N/A - hard to do without breaking template output
V1	All variables shall use lower case: {{ variable }}	N/A - hard to do since associated yaml, json, python, etc may may declare the variable outside of the jinja.
V2	If variable is multi-words, underscore _ shall be used as a separator: {{ my_variable_name }}	N/A - hard to do since associated yaml, json, python, etc may may declare the variable outside of the jinja.