Calc no longer lets you resize a column by double-clicking on the
right edge of the column header.  This looks like a reappearance of
bug 39909 "EDITING: Double Click Doesn't Resize Columns", which was
reported on 2011-08-07 and RESOLVED WORKSFORME on 2012-10-14.  More
specifically:

(1) Create a new worksheet.  Cell A1 is selected.

(2) Type "The quick brown fox jumps over the lazy dog".  The caret is
    visually in the area of cell D1, but the cell address in the
    formula toolbar still shows A1.

(3) Type <tab>.  Cell B1 is selected; the sentence you typed is still
    visible along row 1.

(4) Type "x".  Cell A1 shows "The quick bro", cell B1 shows "x", and
    "over the lazy dog" spreads over C1 and into D1.

(5) Type <return>.  Cell A2 is selected, and cells C1 and D1 are
    blank.

(6) Move the mouse cursor over the right edge of the column header for
    column A.  The cursor changes to a double-headed left-right arrow.

(7) Double-click.

    Program action expected : to make column A wide enough to show the
    whole sentence, moving columns B and following to the right.

    Program action observed : Column A remains the same width it was
    previously.


For comparison, "Optimal Column Width..." from the pop-up menu of the
column heading continues to work as I expect it to, and double-click
resize still works in the Base's Table Data View.


bibisect tells me:

    3791268ce3e6f9e570f02c09d586fd8e9f2485c3 is the first bad commit
    ...
        source-hash-51daa4de4fbb86903aeb9cdfefbb089e8d00c001
        ...

and `git bisect log` shows:

    # bad: [4118d739dbd71e16057ea926ef3ef696025d3b67] source-hash-5bd6a5110bb812f82a81e73422a7b14851f84441
    # good: [3e7462bd65e692bf0592d5b080b7716341b62a47] source-hash-1eddfce9894fd05315173744f495619189093dc7
    git bisect start 'latest' 'oldest'
    # good: [086c82fbd0a50dbf5dd28e8bcc7a6d702cea124e] source-hash-c74f2edfce221960fe546e88f2b3222d69d53598
    git bisect good 086c82fbd0a50dbf5dd28e8bcc7a6d702cea124e
    # good: [9c55481e7358a36177d62899fa1326b76e07332f] source-hash-4c3ad94c70f98f5062bf96a6f1339992b7ec2bd1
    git bisect good 9c55481e7358a36177d62899fa1326b76e07332f
    # good: [9342a3ee4ef4df633567057ea46530d79254b6d2] source-hash-0d61e5dcdbe2cec9df33ac22e3f0e4fbd6a07517
    git bisect good 9342a3ee4ef4df633567057ea46530d79254b6d2
    # bad: [893c8a30f0419e92c94e9c6c435ee2531a6f748c] source-hash-2fc0fa62b26ce34675fcb94de59194592421eeb5
    git bisect bad 893c8a30f0419e92c94e9c6c435ee2531a6f748c
    # good: [159a7f006fe0759d61076916d2ddc1bec2e0fa83] source-hash-bddf3bba1fa13b57a69f2bd5f7c7f96bb945066d
    git bisect good 159a7f006fe0759d61076916d2ddc1bec2e0fa83
    # bad: [6e4f7bdbe1bf434b9ae111c5e83f524113b7c4b8] source-hash-f237f1a616d973397511575c1eb033731d6007f7
    git bisect bad 6e4f7bdbe1bf434b9ae111c5e83f524113b7c4b8
    # bad: [4e06b05aa294d89809817c3ac5743e4328fe363a] source-hash-26a45c1886d9167d8f9ae9aad6234a3702768d8a
    git bisect bad 4e06b05aa294d89809817c3ac5743e4328fe363a
    # bad: [3791268ce3e6f9e570f02c09d586fd8e9f2485c3] source-hash-51daa4de4fbb86903aeb9cdfefbb089e8d00c001
    git bisect bad 3791268ce3e6f9e570f02c09d586fd8e9f2485c3
    # good: [a5620bdfe00015bdba86ee895e26fb4a13721dfe] source-hash-97f71c5f8be85f47d7978259a2d82708412043fd
    git bisect good a5620bdfe00015bdba86ee895e26fb4a13721dfe