Improve handling of nested and dummy leading comments, now properly ignores comments inside the docstring

Implement rudimentary pragmas for linter

Ensure the docstring cursor is always a PETSc linter Cursor, and improve note on no defined paramteres

Handle in-out and same-name function parameters correctly

Don't print extra newline at the end of notes

Allow [](ch_whatever) constructs to not be enclosed by backticks

Reformat the error message output to remove the cursor blurb from the start, it was
confusing and misleading, and add support for color diagnostics

Support in-out parameter descriptions

Need to have test harness remove -options_left to tests that test handling of errors in tests

Commit-type: testing

When the user does not properly handle a returned error code and another error is detected, print a very useful message indicating what has happended.

Reported-by: Stefano Zampini

Merge branch 'barry/2023-06-15/add-fortran-file-viewer' into 'main'

Allow one to attach a PETSCVIEWERASCII to a Fortran file unit

See merge request petsc/petsc!6607

petscviewer.h90 is missing from Fortran modules, add to petscsysmod.

Fix failing linter test

Merge remote-tracking branch 'origin/release'

Fix make check when --prefix points to a read-only file system

In general make check should not be writing anything in a directory indicated by $PETSC_DIR since that is where PETSc is installed.

Sa

Fix make check when --prefix points to a read-only file system

In general make check should not be writing anything in a directory indicated by $PETSC_DIR since that is where PETSc is installed.

Satish, we should have a make install that then uses chmod u-w newpetscdir ; make check to verify this bug never reappears

Reported-by: Drew Parsons

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Add PetscCheck() and PetscCheckA() for Fortran

Also fix incorrect use of " in Fortran examples that should be '

Merge remote-tracking branch 'origin/release'

test(sys): Add sys/tests/ex17.c

Tests PetscSynchronized*()

Merge remote-tracking branch 'origin/release'

Manpages: collective info should go after synopsis

Merge remote-tracking branch 'origin/release'

SYS tests: fixes for FPE

Implement the following optimizations in Petsc::UnorderedMap:

1. Use std::optional to hold the values if C++17 is available. Erased elements are not
fully destroyed in the implementation (they ar

Implement the following optimizations in Petsc::UnorderedMap:

1. Use std::optional to hold the values if C++17 is available. Erased elements are not
fully destroyed in the implementation (they are only marked as destroyed and then
default re-contructed). Using std::optional allows us to skip calling the possibly
non-trivial destructors for these "destroyed" elements on e.g. resize.
2. Add shrink_to_fit() which prunes the capacity of the map to size(). Judicious use of
this function, combined with the above change, makes resize() and further modification
even more efficient.

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