Minor updates to user manual and slurm scripts

[aakash10gupta]

User manual -

• Removed some discontinued Par_file parameters/flags.
• Updated note that general anisotropic parameters' kernels are being written into 21 separate files instead of 1 file.

Slurm scripts -

• Corrected syntax for 'if' statements.

[buildbot-princeton]

The files changed do not require a buildbot test. The maintainers can commit these changes.

[codecov-commenter]

Codecov Report

Base: 45.56% // Head: 45.56% // Increases project coverage by +0.00% :tada:

Coverage data is based on head (8de8a86) compared to base (1a352a6). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## devel #1574 +/- ## ======================================== Coverage 45.56% 45.56% ======================================== Files 247 249 +2 Lines 55268 55512 +244 ======================================== + Hits 25182 25296 +114 - Misses 30086 30216 +130 ``` | [Impacted Files](https://codecov.io/gh/SPECFEM/specfem3d/pull/1574?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM) | Coverage Δ | | |---|---|---| | [src/specfem3D/convert\_time.f90](https://codecov.io/gh/SPECFEM/specfem3d/pull/1574/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM#diff-c3JjL3NwZWNmZW0zRC9jb252ZXJ0X3RpbWUuZjkw) | `64.04% <0.00%> (-2.25%)` | :arrow_down: | | [src/decompose\_mesh/partition\_scotch.F90](https://codecov.io/gh/SPECFEM/specfem3d/pull/1574/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM#diff-c3JjL2RlY29tcG9zZV9tZXNoL3BhcnRpdGlvbl9zY290Y2guRjkw) | `13.47% <0.00%> (-0.20%)` | :arrow_down: | | [src/shared/serial.f90](https://codecov.io/gh/SPECFEM/specfem3d/pull/1574/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM#diff-c3JjL3NoYXJlZC9zZXJpYWwuZjkw) | `47.08% <0.00%> (ø)` | | | [src/generate\_databases/model\_sep\_nompi.f90](https://codecov.io/gh/SPECFEM/specfem3d/pull/1574/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM#diff-c3JjL2dlbmVyYXRlX2RhdGFiYXNlcy9tb2RlbF9zZXBfbm9tcGkuZjkw) | `0.00% <0.00%> (ø)` | | | [src/decompose\_mesh/decompose\_mesh.F90](https://codecov.io/gh/SPECFEM/specfem3d/pull/1574/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM#diff-c3JjL2RlY29tcG9zZV9tZXNoL2RlY29tcG9zZV9tZXNoLkY5MA==) | `72.06% <0.00%> (+0.55%)` | :arrow_up: | | [src/decompose\_mesh/write\_mesh\_databases.F90](https://codecov.io/gh/SPECFEM/specfem3d/pull/1574/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM#diff-c3JjL2RlY29tcG9zZV9tZXNoL3dyaXRlX21lc2hfZGF0YWJhc2VzLkY5MA==) | `87.69% <0.00%> (+3.07%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SPECFEM)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.

[danielpeter]

will close for now, to correct the bash syntax.