Minor cleanup in shell scripts

[KineticTheory]

Background

• Fix comments, headers, quotes
• Only run F90 line length checks on F90 sources.

Status

• Reference:
  • Pre-Merge Code Review
  • CDash Status
• Checks
  • Travis/Appveyor CI checks pass
  • Code coverage does not decrease
  • Valgrind test passes
  • Toss3 checks pass
  • Trinitite checks pass
  • Code reviewed/approved, sufficient DbC checks, testing, documentation

[codecov]

Codecov Report

Merging #1064 (faea552) into develop (2dd63a2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop   #1064   +/-   ##
=======================================
  Coverage     94.0%   94.0%           
=======================================
  Files          368     368           
  Lines        17461   17461           
=======================================
  Hits         16423   16423           
  Misses        1038    1038