Problem:    Using freed memory with put command.
Solution:   Get byte offset before replacing the line.

Problem:    Text property not adjusted for text inserted with "p".
Solution:   Adjust column and length of text properties.

Problem:    Text property "below" gets indent if 'breakindent' is set. (Tim
            Pope)
Solution:   Do not put indent before text property. (closes #10859)

Problem:    Warning for uninitialized variable. (Tony Mechelynck)
Solution:   Initialize line_attr_save.

Problem:    Some diff mode tests fail.
Solution:   Only advance "ptr" when a text property follows.

Problem:    Cannot build with small features.
Solution:   Check for E1170 only with FEAT_EVAL.

Problem:    With 'nowrap' "below" property not displayed correctly.
Solution:   Adjust virtual text with 'nowrap', do not truncate.

Problem:    'showbreak' displayed below truncated "after" text prop.
Solution:   Suppress 'showbreak' when "after" prop doesn't wrap.

Problem:    Giving E1170 only in an expression is confusing.
Solution:   Give E1170 for any "#{ comment". (closes #10855)

Problem:    No test for what patch 9.0.0155 fixes.
Solution:   Add a test. Fix typos.  (closes #10822)