patch 9.0.0055: bitbake files are not detected

Problem:    Bitbake files are not detected.
Solution:   Add bitbake filetype detection by file name and contents. (Gregory
            Anders, closes vim#10697)

patch 9.0.0054: compiler warning for size_t to int conversion

Problem:    Compiler warning for size_t to int conversion.
Solution:   Add type cast. (Mike Williams, closes vim#10741)

patch 9.0.0053: E1281 not tested with the old regexp engine

Problem:    E1281 not tested with the old regexp engine.
Solution:   Loop over the values of 'regexp'. (Dominique Pellé, closes vim#10695)

patch 9.0.0052: "zG" may throw an error if invalid character follows

Problem:    "zG" may throw an error if invalid character follows.
Solution:   Pass the word length to valid_spell_word(). (Ken Takata,
            closes vim#10737)

patch 9.0.0051: using CTRL-C wih :append may hang Vim

Problem:    Using CTRL-C wih :append may hang Vim.
Solution:   Reset got_int. (closes vim#10729, closes vim#10728)

patch 9.0.0050: split else-of is confusing

Problem:    Split else-of is confusing.
Solution:   Join the lines. (closes vim#10696)

patch 9.0.0049: csv and tsv files are not recognized

Problem:    Csv and tsv files are not recognized.
Solution:   Add patterns fo csv and tsv files. (Leandro Lourenci,
            closes vim#10680)

patch 9.0.0048: cursor in wrong column with mouse click after conceal…

…ed text

Problem:    Cursor in wrong column with mouse click after concealed text.
Solution:   Store the text column when drawing text.

patch 9.0.0047: using freed memory with recursive substitute

Problem:    Using freed memory with recursive substitute.
Solution:   Always make a copy for reg_prev_sub.

patch 9.0.0046: reading past end of completion with duplicate match

Problem:    Reading past end of completion with duplicate match.
Solution:   Check string length