[Code formatting] Support option to exclude sections of code when using Format Document

[ShuguangSun]

Is your feature request related to a problem? Please describe.
I'd like it is not to be formated in the PROC FORMAT or PROC SQL, or other special situations. For example, if I format the code below

proc format;
  value range
    40000-high='High'
    26000-< 40000='Medium'
    other ='Low';

  invalue evaluation
    'O'=4
    'S'=3
    'E'=2
    'C'=1
    'N'=0;
run;

It becomes

proc format;
  value range 40000-high='High' 26000-< 40000='Medium' other='Low';

  invalue evaluation 'O'=4 'S'=3 'E'=2 'C'=1 'N'=0;
run;

I'd like to keep the format of the first one.

For PROC SQL, it is similar. Usually I'll make a separate sql script file to format code and then paste it back, however, sas extension's format will make it flat again.

Describe the solution you'd like
I'd like to suggest add some thing like REGION. For example,

proc format;
  /* sas-format-disable */
  value range
    40000-high='High'
    26000-< 40000='Medium'
    other ='Low';

  invalue evaluation
    'O'=4
    'S'=3
    'E'=2
    'C'=1
    'N'=0;
  /* sas-format-enable */
run;

proc sql;
  * sas-format-disable;
  select
    momage,
    (weight * 0.01) as newweight
  from
    outdata
  where
    calculated newweight > 5;
  * sas-format-enable ;
run;

Environment
SAS version 9.4

[ShuguangSun]

This is an extended feature request of #989 .

[Snoopy1866]

I wonder if there are any protocol about formatting conventions in SAS, similar PEP8 in Python. @scnwwu

[Snoopy1866]

If that a protocol exist, we can write a standalone VSCode extension purely for formatting, just like the black, flake8 or autopep8 did.