Problem:    Code is indented more than necessary.
Solution:   Use an early return where it makes sense. (Yegappan Lakshmanan,
            closes #11858)

Problem:    Error message names do not match the items.
Solution:   Add "_str" when the text contains "%s".

Problem:    Crash when unletting a variable while listing variables.
Solution:   Disallow changing a hashtable while going over the entries.
            (closes #11435)

Problem:    Crash when popup closed in callback. (Maxim Kim)
Solution:   In syntax_end_parsing() check that syn_block is valid.

Problem:    No good reason to build without the float feature.
Solution:   Remove configure check for float and "#ifdef FEAT_FLOAT".

Problem:    Using static buffer for multiple completion functions.
Solution:   Use one buffer in expand_T.

Problem:    Cannot complete "syn list @cluster".
Solution:   Recognize and handle "list @". (Björn Linse, closes #10990)

Problem:    Redraw flags are not named specifically.
Solution:   Prefix "UPD_" to the flags, for UPDate_screen().

Problem:    Code has more indent than needed.
Solution:   Use continue and return statements. (closes #10824)

Problem:    Syntax highlighting disabled when using synID() in searchpair()
            skip expression and it times out. (Jaehwang Jung)
Solution:   Add the redrawtime_limit_set flag. (closes #10562)