refactor of matrices

[izulin]

Context

Removal of deprecated {=FORMULA} notation. Now it should be integrated into regular formulas, which should be able to return arrays instead of just scalars.

Also, fixes issue #651

How has this been tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature or improvement (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Additional language file or change to the existing one (translations)

Related issue(s):

Checklist:

• My code follows the code style of this project,
• My change requires a change to the documentation,
• I described the modification in the CHANGELOG.md file.

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging e19d9db into afd9919 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@b5115dc). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 580f447 differs from pull request most recent head 5cb0e6a. Consider uploading reports for the commit 5cb0e6a to get more accurate results

@@            Coverage Diff             @@
##             develop     #652   +/-   ##
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  Coverage           ?   92.42%           
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  Files              ?      166           
  Lines              ?    38859           
  Branches           ?     3548           
==========================================
  Hits               ?    35915           
  Misses             ?     2938           
  Partials           ?        6           

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging 920074f into afd9919 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging 58820f3 into c223cd0 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging b5a2ed9 into 80e7f98 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging 38926b1 into cf800ce - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging be1b7ed into 0eb13b2 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging 75ebaf5 into aa1e4d1 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging ea58825 into 0bb0dbe - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 7 alerts and fixes 2 when merging 12cbe79 into 0b1b074 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class
• 2 for Assignment to constant
• 1 for Useless assignment to local variable

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging 580f447 into 0b1b074 - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 4 alerts and fixes 2 when merging 5cb0e6a into b5115dc - view on LGTM.com

new alerts:

• 4 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class