Fix problems in comments found by Alexander Kobotov

Fix problems in comments found by Alexander Kobotov

Just taking a quick look on the new release I noticed some minor issues there, which probably caused by a generation script:
- If you explore diff for files (c/z)gbrfsx, cgbsvx, cgbsvxx, cheequb, clanhf, zheequb you could find that number of datatype descriptions in documentation were changed to incorrect one (DOUBLE PRECISION instead of COMPLEX, or COMPLEX*16 instead of just COMPLEX).
+ cunbdb has CMPLX instead of COMPLEX for X12 parameter.
+ zggevx RWORK become REAL instead of correct DOUBLE PRECISION
- Number of files got following string "/ output)", which seems meaningless. Just grep for it.