On 2 November 2016 at 16:51, Coacher wrote:

 > [...] Consider the following file:
 >
 > \begin{env}
 > xxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 > \end{env}
 >
 > Open it like this: vim -N -u NONE -c 'filetype plugin indent on' -c
'set ft=tex' <filename>
 > Place the cursor at the beginning of the second line.
 > In Normal mode type 'gqgq' to format it.
 >
 > Actual results:
 >
 > \begin{env}
 > xxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 > xxxxxxxxxxxxxxxxxxxx
 > xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 > \end{env}
 > Expected results:
 >
 > \begin{env}
 > xxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 > xxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 > \end{env}
 >
 > [...]

That's because 'o' in 'indentkeys' is causing new lines to be
indented according to 'indentexpr'. If you hit '==' to indent before
reflowing the second line, you get:

    \begin{env}
            xxxxxxxxxxxxxxxxxxxx
            xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
            xxxxxxxxxxxxxxxxxxxx
            xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    \end{env}

This seems reasonable to me. --Antony

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