tests: make tests with temporary environment setting portable With "dash" (as "/bin/sh" on Debian GNU/Linux), command execution in "ENV=val foo bar" style doesn't work as expect in test script files, if "foo" is user-defined function: it works fine, if "foo" is existing commands like "hg". 09049042ab99 introduced tests for HGPLAIN and HGPLAINEXCEPT into test-revset.t, and all of them are in such style. This patch doesn't: - add explicit unsetting for HGPLAIN and HGPLAINEXCEPT they are already introduced by 09049042ab99 - write assignment and exporting in one line "ENV=val; export ENV" for two or more environment variables in one line causes failure of test-check-code-hg.t: it is recognized as "don't export and assign at once" unfortunately.

     1

'a' in d: True

     2

d['a']: va

     3

'b' in d: True

     4

d['b']: vb

     5

'c' in d: True

     6

d['c']: vc

     7

'd' in d: True

     8

d['d']: vd

     9

'a' in d: False

    10

'b' in d: True

    11

d['b']: vb

    12

'c' in d: True

    13

d['c']: vc

    14

'd' in d: True

    15

d['d']: vd

    16

'e' in d: True

    17

d['e']: ve

    18

'b' in d: True

    19

d['b']: vb2

    20

'c' in d: True

    21

d['c']: vc2

    22

'd' in d: True

    23

d['d']: vd

    24

'e' in d: False

    25

'f' in d: True

    26

d['f']: vf

    27

'b' in d: False

    28

'c' in d: False

    29

'd' in d: False

    30

'e' in d: False

    31

'f' in d: False