Set README.md & folding header into last state.
Feature branch:
Develop universal function 'shield' for any variant escape character
for simplify any regexp's.
In the 'shield' function main part of substitution
enclosed in nested function the 'main_substitution'.
Create function 'shield2' - with simplified sintax.
Cyclic sybst: +, ?, (,  , \, |, ) is escaped with baskskash - \+, \?, \\...
Strings as: \+, \?, \(, \ , \\, \|, \) was changed +, ?, (baskslash is discarded)
Set of substitution stored in variable.
Parsing the options: 1'st variant.
Configuring the 'shield2' function from option.
The new variant of option parsing.
Now only demo parsing - not real work.
Configurating is enabled.
Enable processing for the 'shield2' function.
Process is not correct.
Inner function in the 'shield2' function - main_subst -
was parametrized & clean all the pair of backslashes - '\\'
in shielded text. It's slightly uncorrect, but work.
Correct back substitution for clean of excess backslash pair ("\\").
Merge branch 'feature-shield-w-param-v.1'
Corect merging from branch 'feature-shield-w-param-v.1'.
The function 'shield2' was implemented in the folding.
Using only one 'shield2' function as only one var 'shield' function.
Inserted 'submenu' keyword as break the section fetching criteria
Clean the file 'folding' for prepare to release.
More modify for product variant.
Remove development files.
Final cleanning files.